WO2012022239A1

WO2012022239A1 - Method, base station, and user equipment for control channel transmission and resources confirmation

Info

Publication number: WO2012022239A1
Application number: PCT/CN2011/078344
Authority: WO
Inventors: 林亚男; 沈祖康; 高雪娟
Original assignee: 电信科学技术研究院
Priority date: 2010-08-17
Filing date: 2011-08-12
Publication date: 2012-02-23
Also published as: CN102378373A

Abstract

A method, a base station, and a piece of user equipment (UE) for controlling the transmission and allocation of channel resources, for an increase in the utilization of control channel resources and transmission efficiency. The method comprises: on the base station, targeting at least one downlink (DL) subframe; indicating within the DL subframe an uplink (UL) control channel resource allocated from a designated UL control channel resource collection to the UE by the base station; the designated UL control channel resource collection comprising at lease two types of UL channel control resources, each type of resources corresponding to one type of UL control channel transmission format; transmitting in the at least one DL subframe a physical downlink control channel (PDCCH); receiving on the allocated UL control channel resource a UL control signal feedback from the UE. As the UL control channel resources for use in transmitting the UL control signal is allocated by the base station to the UE, the need for a reservation of resources in each UL carrier for a DL carrier corresponding thereto is obviated, thereby improving control channel resources utilization rate and transmission efficiency.

Description

Method for determining control channel transmission and resource, base station and user equipment. The application is submitted to the Chinese Patent Office on August 17, 2010, and the application number is 201010256194.3. The invention name is "a control channel transmission and resource determination method, a base station and The priority of the Chinese Patent Application, the entire disclosure of which is incorporated herein by reference.

Technical field

The present invention relates to the field of mobile communications, and in particular, to a control channel transmission and resource determining method, a base station, and a user equipment. Background technique

Currently, in a long-term evolution multi-carrier system, there may be multiple user equipments with different aggregation capabilities. When using the frequency aggregation aggregation technology, the base station configures asymmetric carrier aggregation for the user equipment according to the aggregation capability of the user equipment and specific service requirements. . In general, the number of DL (downlink) carriers is greater than the number of UL (Up Link) carriers. Therefore, to flexibly support various proportions of asymmetric carrier aggregation, the system needs to be on each uplink. A certain feedback resource is reserved for each downlink carrier in the carrier, so that the user equipment receives the data packet sent by the base station and determines an ACK (ACKnowledge Character) or NACK (Negative ACKnowledg Character). When a certain resource is selected from the feedback resources reserved by the uplink carrier, the ACK or NACK is fed back to the base station.

In the long-term evolution multi-carrier system, in order to improve the reliability of data transmission, HA Q (Hybrid Automatic Repeat reQuest) technology is generally adopted. After the downlink HARQ function is enabled, the user equipment decodes the received downlink data packet, and if the decoding is correct, the ACK is fed back to the base station by using the resource reserved by the uplink carrier; if the decoding fails, the resource reserved by the uplink carrier is reserved. The NACK is fed back to the base station to request the base station to retransmit the downlink data packet. After the downlink persistent scheduling service ends, the base station sends an SPS (semi-persistent scheduling) resource release to the user equipment. The indication is to notify the user equipment to release all the resources allocated by the system for the current service; after receiving the SPS resource release indication sent by the base station, the user equipment feeds back the ACK to the base station.

For long-term evolution multi-carrier systems, to support a wider system bandwidth than LTE (Long Term Evolution) systems, such as to support 100MHz system bandwidth, the system can directly allocate 100MHz system bandwidth, as shown in Figure 1; All or part of the spectrum that has been allocated to other systems is aggregated and made into a system bandwidth of 100 MHz to provide a long-term evolution multi-carrier system, as shown in Figure 2; in this case, the uplink and downlink carriers in the system can be asymmetrically configured. For example, the user equipment can occupy N (N≥1) carriers for downlink transmission, and occupy M (M > 1) carriers for uplink transmission.

At present, the standardization work has basically completed the ACK or NACK feedback scheme in the LTE system (such as Rel-8). For each working carrier, the downlink control signaling, the downlink data, the uplink control signaling, and the uplink data are respectively defined and Transmission relationship; the way to transmit data and control signaling in an LTE system is as follows:

For the FDD (Frequency Division Duplexing) system, FIG. 3A and FIG. 3B are respectively schematic diagrams of the downlink transmission and the uplink transmission of the FDD system; in FIG. 3B, the uplink control signaling occupies the edge region of the frequency band, and jumps through In the frequency mode, the uplink control signaling is transmitted in different frequency bands in the two time slots in one uplink subframe. The transmission mode cannot dynamically learn the number of control channels to be carried in the uplink subframe. A certain resource needs to be reserved in the uplink subframe for uplink control channel transmission, such as reserved resources (areas filled with diagonal lines) in FIG. 3B.

For the TDD (Time Division Duplexing) system, Figure 4 is a schematic diagram of the structure of the TDD system for uplink and downlink transmission. Similarly, a certain resource is reserved in the uplink subframe of the TDD system for uplink control channel transmission. , Reserved resources are the areas filled with slashes in the figure.

In the prior art, for dynamically scheduled ACK or NACK feedback, the user equipment controls the CCE (Control Channel Element) corresponding to the downlink control signaling in the received PDCCH (Physical Downlink Control Channel). The number of the channel element) (represented by "^") is used to determine the ACK or ACK from the resources reserved in the uplink carrier. The number of the NACK resource (indicated by ") is used to feed back the ACK or NACK to the base station using the determined resource numbered "that is, each PDCCH corresponds to an available uplink control channel resource.

Currently, the ACK or NACK transmission mode needs to reserve resources for feeding back ACK or NACK for its corresponding downlink carrier in each uplink carrier. Due to the large number of user equipments and the number of carriers in the system, there is a large waste of channel resources in the uplink carrier, which may result in no uplink resources available for data transmission.

In summary, the current control channel resource allocation mode has the problems of large waste of channel resources, low utilization of channel resources, and low transmission efficiency. Summary of the invention

The present invention provides a control channel transmission and resource determining method, a base station, and a user equipment to improve utilization and transmission efficiency of control channel resources.

A method for controlling channel transmission and resource determination includes:

And the base station indicates, in the downlink subframe, an uplink control channel resource allocated by the base station to the user equipment in the specified uplink control channel resource set, where the specified uplink control channel resource set includes at least two types of uplink channel control. Resources, each type of uplink control channel resource corresponds to an uplink control channel transmission format;

The base station transmits a downlink physical control channel PDCCH in the at least one downlink subframe;

The base station receives the uplink control signal fed back by the UE on the allocated uplink control channel resource. A method for controlling channel transmission and resource determination includes:

The user equipment UE receives the physical downlink control channel PDCCH in the at least one downlink subframe sent by the base station, where the downlink subframe indicates an uplink control channel resource allocated by the base station to the UE in the specified uplink control channel resource set, where the designation The uplink control channel resource set includes at least two types of uplink channel control resources, and each type of uplink control channel resource corresponds to one uplink control channel transmission format; and the UE selects one of the uplink control channel resources indicated by the at least one downlink subframe. An uplink control channel resource for feeding back an uplink control signal; The UE feeds back an uplink control signal in the selected uplink control channel resource.

A base station comprising:

a resource configuration unit, configured to indicate, in the downlink subframe, an uplink control channel resource allocated by the base station to the user equipment in the specified uplink control channel resource set, where the specified uplink control channel resource set includes at least one downlink subframe Two types of uplink channel control resources, each type of uplink control channel resource corresponding to an uplink control channel transmission format;

And a transceiver unit, configured to transmit a downlink physical control channel PDCCH in the at least one downlink subframe, and configured to receive an uplink control signal fed back by the UE on the allocated uplink control channel resource.

A user equipment, including:

a transceiver unit, configured to receive, by using a physical downlink control channel (PDCCH) in at least one downlink subframe sent by the base station, where the downlink subframe indicates an uplink control channel resource allocated by the base station to the UE in the specified uplink control channel resource set, where The specified uplink control channel resource set includes at least two types of uplink channel control resources, each type of uplink control channel resource corresponding to an uplink control channel transmission format, and configured to feed back an uplink control signal in the uplink control channel resource selected by the resource determining unit. ;

The resource determining unit is configured to select an uplink control channel resource for feeding back the uplink control signal in the uplink control channel resource indicated by the at least one downlink subframe.

In the embodiment of the present invention, the at least one downlink subframe is configured to indicate, in the downlink subframe, that the base station allocates one uplink control channel resource to the user equipment in the specified uplink control channel resource set, and the designated uplink control channel resource set includes at least two types of uplink. The channel control resource, each type of uplink control channel resource corresponds to an uplink control channel transmission format; the base station transmits the PDCCH in at least one downlink subframe; and the base station receives the uplink control signal fed back by the UE on the allocated uplink control channel resource. According to the technical solution of the present invention, since the base station has previously specified the uplink control channel resource for feeding back the uplink control signal for the user equipment, it is not required to reserve the uplink control signal for the corresponding downlink carrier in each uplink carrier. Feedback resources, thereby improving the utilization and transmission efficiency of control channel resources. DRAWINGS

1 is a schematic diagram of a system broadband of a single frequency transmission system in the background art;

2 is a schematic diagram of uplink and downlink transmission of a spectrum aggregation system in the background art;

3A is a schematic diagram of downlink transmission in an FDD system in the background art;

3B is a schematic diagram of uplink transmission in an FDD system in the background art;

4 is a schematic diagram of uplink and downlink transmission in a TDD system in the background art;

FIG. 5 is a flowchart of a method for feeding back an uplink control signal according to an embodiment of the present invention;

6 is a schematic diagram showing a mapping relationship between indication information of a DCI and an allocated feedback resource according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of allocating feedback resources for a user equipment configured for uplink control signal combining transmission in a TDD system according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of allocating feedback resources for a user equipment configured for uplink control signal multiplexing transmission in a TDD system according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a base station according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a user equipment according to an embodiment of the present invention. detailed description

In the embodiment of the present invention, the base station indicates, in the downlink subframe, an uplink control channel resource allocated by the base station to the user equipment in the specified uplink control channel resource set in the downlink subframe (that is, the base station passes in at least one downlink subframe. The PDCCH is a user equipment (UE) that allocates one uplink control channel resource in the specified uplink control channel resource set;), the designated uplink control channel resource set includes at least two types of uplink channel control resources, and each type of uplink control channel resource corresponds to one uplink control. Channel transmission format: The base station transmits the PDCCH in at least one downlink subframe; the base station receives the uplink control signal fed back by the UE on the allocated uplink control channel resource. Receiving, by the UE, the PDCCH in the at least one downlink subframe sent by the base station, where the downlink subframe indicates an uplink control channel resource allocated by the base station to the UE in the specified uplink control channel resource set; the UE indicates in at least one downlink subframe An uplink control channel resource for feeding back an uplink control signal is selected from the uplink control channel resource; and an uplink control signal is fed back to the selected uplink control channel resource (the uplink control signal may include an ACK and/or a NACK).

According to the technical solution of the present invention, since the base station has previously specified the uplink control channel resource for feeding back the uplink control signal for the user equipment, it is not required to reserve the uplink control signal for the corresponding downlink carrier in each uplink carrier. Feedback resources, thereby improving the utilization and transmission efficiency of control channel resources.

In the embodiment of the present invention, a multiplexed transmission of a multi-bit ACK or a NACK based on channel selection requires a set of control channel resources in each subframe of the user equipment; for using DFT-S-OFDM (Orthogonalization based on discrete Fourier transform) Multi-bit multiplex transmission of frequency division multiplexing or ACK or NACK combining transmission using PUCCH format la/lb, the user equipment only needs one control channel resource in each subframe.

It should be noted that, because the concept of "feedback window" is involved in the embodiment of the present invention, although the "feedback window" is prior art, in order to further understand by those skilled in the art, the "feedback window" is determined here. The introduction of the degree.

At present, in the LTE-A (Long Term Evolution-Advanced) system, the aggregation of up to five carriers can be supported. When the user equipment feeds back the uplink control signal, multiple downlink carriers are transmitted in the same uplink subframe. The uplink control signal corresponding to the downlink subframe is a so-called "feedback window". In the FDD (Frequency Division Duplex) system, the size of the feedback window is the number of downlink carriers participating in the aggregation when the user equipment performs carrier aggregation. In the TDD (Time Division Duplex) system, the feedback window is The size is (NxM), where N is the number of downlink carriers that the user equipment participates in during carrier aggregation, and M is the number of downlink subframes that need to feed back uplink control signals in the same uplink subframe. The value of M is based on the upper and lower The configuration of the number of row carriers and the number of uplink subframes are determined. For details, refer to Table 1. UL-DL configuration

0 1 2 3 4 5 6 7 8 9

0 - - 6 - 4 - - 6 - 4

1 - - 7,6 4 - - - 7,6 4 -

2 - - 8,7,4,6 - - - - 8,7,4,6 - -

3 - - 7,6,11 6,5 5,4 - - - - -

4 - - 12,8,7,11 6,5,4,7 - - - - - -

5 13,12,9,8,7,5,4,11,6

6 - - 7 7 5 - - 7 7 - Table 1 is the downlink combination configuration parameter in the TDD system. The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.

In the following description, the implementation of the cooperation between the network side and the user equipment side will be described first. Finally, the implementations from the network side and the user equipment side will be described separately, but this does not mean that the two must be implemented together. In fact, When the network side is implemented separately from the user equipment side, the problems existing on the network side and the user equipment side are also solved, but when the two are combined, a better technical effect is obtained.

5 is a flowchart of a method for controlling channel transmission and resource determination according to an embodiment of the present invention, where the method includes the following steps:

Step 501: The base station allocates N uplink control channel resources (N≥l) to the user equipment, and notifies the user equipment of the N uplink control channel resources.

Step 502: The base station sends a downlink data packet to the user equipment, and allocates, in the downlink subframe of the downlink data packet, an uplink control channel resource to the user equipment in the specified uplink control channel resource set by using the PDCCH, and allocates the uplink control channel resource. The uplink control channel resource is notified to the user equipment.

In this step, the specified uplink control channel resource set includes at least one type of uplink control channel resource.

For example, the first type of uplink control channel resources and/or the second type of uplink control channel resources are included. The first type of uplink control channel resources are determined by the high layer signaling configuration, and the first type of uplink control channel The uplink control channel transmission format corresponding to the resource is DFT-S-OFDM, PUCCH format lb with channel selection (channel selection using physical uplink control channel format lb) or PUCCH format la/lb; the second in the set of uplink control channel resources is specified. The uplink control channel resource is determined by the sequence number of the CCE of the PDCCH, and the uplink control channel transmission format corresponding to the second type of uplink control channel resource is PUCCH format la/lb or PUCCH format lb with channel sdsction.

Step 503: The user equipment determines, according to the downlink data packet sent by the base station, a corresponding uplink control signal.

Step 504: The user equipment feeds back the determined uplink control signal to the base station in the uplink control channel resource specified by the base station.

In the foregoing step 501, the base station allocates, by the high-layer signaling, the uplink control channel resources for the user equipment to the feedback uplink control signal (in the embodiment of the present invention, the uplink control signal may include ACK and/or NAC), and Generating, according to the identifier information (such as the number) of the N uplink control channel resources, a specified uplink control channel resource set corresponding to the user equipment, where the specified uplink control channel resource set includes N elements, and each element corresponds to an uplink. The number of the control channel resource. The base station sends the generated specified uplink control channel resource set to the corresponding user equipment by using a high-level RRC (Radio Resource Control) signal.

Preferably, in order to improve resource utilization, the N control channel resources allocated to the user equipment in the embodiment of the present invention may also be shared by other user equipments; the base station uses scheduling restrictions, and multiple user equipments time-multiplex each control channel. The resource avoids the problem that multiple user equipments use the same control channel resource at the same time to cause control channel resource collision.

In the foregoing step 502, after the base station allocates the uplink control channel resource to the user equipment, the base station may notify the allocated uplink control channel resource to the user equipment by transmitting a downlink scheduling indication (DL grant) on the PDCCH, where the designated byte of the DL grant indicates the allocated Uplink control channel resources;

Correspondingly, the user equipment receives the downlink scheduling indication DL grant sent by the base station on the PDCCH.

The number of bits of the specified byte of the DL grant is set to: = "log ₂ (N + l), formula (1);

In the formula (1), L is the number of bits of the specified byte, and W is the total number of uplink control channel resources included in the specified uplink control channel resource set.

In the foregoing step 502, after the base station allocates the uplink control channel resource to the user equipment, the base station may further transmit signaling for indicating the semi-persistent scheduling of the SPS resource on the PDCCH, where the signaling indicating the release of the SPS resource carries the indication a specified byte of the uplink control channel resource allocated for feeding back the uplink control signal;

Correspondingly, the user equipment receives, on the PDCCH, signaling that is sent by the base station to indicate the release of the SPS resource.

Preferably, in the foregoing step 504, the user equipment determines the uplink control channel resource for the multiple uplink subframes, and the determined uplink control channel resource corresponds to the same uplink subframe; if the determined uplink control channel resource includes at least one first class Uplink control channel resource, the user equipment uses the latest uplink control channel resource of the first type of uplink control channel resource to transmit uplink control information, where the latest uplink control channel resource is multiple downlink subframes (the multiple downlink subframes correspond to The uplink control channel resource is the uplink control channel resource corresponding to the last downlink subframe received by the user equipment in the first type of uplink control channel resource.

Preferably, the base station specifies an uplink control channel resource for transmitting the uplink control signal for the user equipment from the specified uplink control channel resource set according to the manner in which the user equipment feeds back the uplink control signal, specifically:

The manner in which the user equipment feeds back the uplink control signal is a combined transmission, that is, the user equipment combines the uplink control signals corresponding to the multiple scheduled downlink subframes in the data packet into one uplink control signal: if used to transmit the primary carrier of the downlink subframe of the downlink data packet There is only one implicit resource corresponding to the PDCCH, and the base station instructs the user equipment to use the implicit resource corresponding to the PDCCH to feed back the uplink control signal; otherwise, the base station selects a currently available uplink control channel from the specified uplink control channel resource. The resource feeds up the uplink control signal.

The manner in which the user equipment feeds back the uplink control signal is multiplexed transmission, that is, the user equipment needs to transmit each Scheduling the uplink control signal corresponding to the downlink subframe: If the base station schedules only one data packet transmitted by the PDCCH on the primary carrier in the downlink subframe, the base station instructs the user equipment to use the implicit resource corresponding to the PDCCH to transmit the corresponding downlink subframe corresponding to the PDCCH. Uplink control signal; otherwise, the base station selects a currently available uplink control channel resource from the specified uplink control channel resource set, and instructs the user equipment to use the specified uplink control channel resource to feed back the uplink control signal corresponding to each scheduled downlink subframe.

Preferably, in order to ensure that the base station can confirm that all the downlink subframes of the delivered data packet have been successfully sent to the user equipment to ensure the reliability of the data transmission, in the embodiment of the present invention, all the downlink sub-subjects received by the user equipment If the uplink control channel resource corresponding to the specified byte of the DL grant of the frame is an implicit resource, the user equipment according to the uplink control channel corresponding to the specified byte of the DL grant in the last scheduled downlink subframe received in the feedback window. Resources, feedback upstream control signals.

In order to make the technical solutions of the present invention clear to those skilled in the art, the technical solutions of the present invention will be described in detail below with a specific example.

It is assumed that the base station allocates three uplink control channel resources for feeding back the uplink control signal to the user equipment through the high layer signaling, and the identifier information corresponding to the three uplink control channel resources, such as the resource 1, the resource 2, and the resource 3. The base station generates, according to the number of the allocated three uplink control channel resources, the specified uplink control channel resource set to the user equipment as {implicit resource, resource 1, resource 2, resource 3}; according to formula (1), the DL grant is specified. The byte is 2 bits, and the mapping relationship between the specified byte and the uplink control channel resource is as shown in FIG. 6. In FIG. 6, when the designated byte of the DL grant is "00", the corresponding uplink control channel resource is an implicit resource corresponding to the PDCCH of the user equipment, that is, the base station instructs the user equipment to use the implicit resource corresponding to the PDCCH to transmit the corresponding resource. The uplink control signal; when the specified byte of the DL grant is "01", the corresponding uplink control channel resource is the resource 1 allocated to the user equipment, that is, the base station instructs the user equipment to use the resource 1 to transmit the corresponding uplink control signal; When the specified byte of the DL grant is "10", the corresponding uplink control channel resource is the resource 2 allocated to the user equipment, that is, the base station instructs the user equipment to use the resource 2 to transmit the corresponding uplink control signal; When the section is "11", the corresponding uplink control channel resource is the resource 3 allocated to the user equipment, that is, the base station instructs the user equipment to use the resource 3 to transmit the corresponding uplink control signal. At the base station, when it is determined that the manner in which the user equipment feeds back the uplink control signal is a combined transmission, for each downlink subframe in the data packet, if there is a unique one on the primary carrier used for transmitting the downlink subframe

When the PDCCH corresponding to the PDCCH is an implicit resource, the base station carries the specified byte "00" in the DL grant of the downlink subframe. Otherwise, the base station carries the designated byte "01", "10" or the DL grant in the downlink subframe. "11".

At the base station, when it is determined that the manner in which the user equipment feeds back the uplink control signal is multiplexed transmission, for each downlink subframe in the data packet, if the base station only schedules one data packet in the downlink subframe, and the data packet When transmitting on the primary carrier, the base station carries the designated byte "00" in the DL grant of the downlink subframe. Otherwise, the base station carries the designated byte "01", "10" or "11" in the DL grant of the subframe. ".

In conjunction with practical applications, the embodiments of the present invention provide further detailed descriptions of the use of implicit resources from the FDD system and the control channel resource allocation of the TDD system.

For the FDD system:

When the specified byte "00" of the DL grant of a certain downlink subframe exists in the plurality of downlink subframes received by the user equipment, the user equipment uses the PUCCH format la/ regardless of the manner in which the user equipment feeds back the uplink control signal. The lb transmits the corresponding uplink control signal on the implicit resource corresponding to the PDCCH, for example, when the user equipment feeds back the uplink control signal in a merged manner, the user equipment adopts an uplink control channel transmission format corresponding to the implicit resource (for example, PUCCH format lb With the channel selection or the PUCCH format la/lb), the combined uplink control signal is transmitted on the implicit resource corresponding to the PDCCH; when the user equipment feeds back the uplink control signal in the multiplex transmission, the user equipment uses the implicit resource The corresponding uplink control channel transmission format (such as DFT-S-OFDM) transmits the uplink control signal corresponding to each scheduled downlink subframe in the implicit resource corresponding to the PDDCH.

For the TDD system:

The manner in which the user equipment feeds back the uplink control signal is a combined transmission. When the primary carrier of a certain downlink subframe received by the user equipment has only one implicit resource corresponding to the PDCCH, the user equipment adopts an uplink corresponding to the implicit resource. The control channel transmission format (such as PUCCH format lb with channel selection, PUCCH format la/lb) feeds back an uplink control signal in an implicit resource corresponding to the PDCCH; Preferably, in order to ensure that the base station can confirm that all the subframes of the delivered data packet have been successfully sent to the user equipment to ensure the reliability of data transmission, in the embodiment of the present invention, all downlink subframes received by the user equipment When the uplink control channel resource corresponding to the specified byte of the DL grant is an implicit resource, the user equipment may also select the uplink control channel resource corresponding to the specified byte in the DL grant of the last scheduled downlink subframe in the data packet, and transmit and merge. After the uplink control signal;

The manner in which the user equipment feeds back the uplink control signal is a multiplexed transmission, and the user equipment adopts an uplink control channel transmission format corresponding to the implicit resource, and in the uplink control channel resource corresponding to the specified byte of the DL grant of the last scheduled downlink subframe, The uplink control signal corresponding to each downlink subframe is fed back, as follows:

If the designated byte of the DL grant of a downlink subframe that is fed back to the user equipment is not "00", the designated byte of the DL grant of the subsequent downlink subframe that the base station feeds back to the user equipment is also the above non- The specified byte of "00".

The manner in which the user equipment feeds back the uplink control signal is the channel selection multiplexing transmission. If the specified byte in the DL grant of all the downlink subframes received by the user equipment is "00", the user equipment uses the PUCCH format la/lb in the PDCCH. The uplink control channel resource is selected on the implicit resource, and the uplink control signal corresponding to each downlink subframe is transmitted in the selected uplink control channel resource; and the DL grant of the multiple downlink subframes of the subsequent part received by the user equipment When the specified bytes in the same are both "00", the user equipment adopts an uplink control channel transmission format corresponding to the fee implicit resource (such as PUCCH format la/lb, PUCCH format lb with channel selection), in the designation. The uplink control signal corresponding to each downlink subframe is transmitted in the non-implicit resource corresponding to the byte.

The manner in which the user equipment feeds back the uplink control signal is DFT-S-OFDM multiplex transmission. When the specified byte in the DL grant of all downlink subframes received by the user equipment is "00", the user equipment uses the PUCCH format la/lb. The uplink control signal corresponding to each downlink subframe is transmitted in the implicit resource corresponding to the PDCCH; if the designated byte in the DL grant of the subsequent downlink subframe received by the user equipment is the same and both are not "00", the user equipment uses The DFT-S-OFDM transmits an uplink control signal corresponding to each downlink subframe in a non-implicit resource corresponding to the specified byte. The feedback of the uplink control signal of the above TDD system is described in a clearer and more detailed manner by a specific example.

Referring to FIG. 7, FIG. 7 is a schematic diagram of allocating feedback resources for a user equipment configured for uplink control signal combining transmission in a TDD system according to an embodiment of the present invention, where FIG. 7 is:

It is assumed that the data packet received by the user equipment includes four downlink subframes, which are respectively represented by downlink subframe 1, downlink subframe 2, downlink subframe 3, and downlink subframe 4, and the base station is in downlink subframe 1, downlink subframe 2, and The downlink subframe 4 only calls one data packet, and the downlink subframe 1, the downlink subframe 2, and the downlink subframe 4 are respectively transmitted on the primary carrier, and therefore, the specified byte in the DL grant corresponding to the three subframes. It is "00" (ie, implicit resource), and the data of the downlink subframe 3 is transmitted on the subcarrier, and the designated byte in the DL grant corresponding to the downlink subframe 3 is "01"; The uplink control signal after the uplink control signal corresponding to the downlink subframe is combined is fed back to the base station on the implicit resource corresponding to the PDCCH.

FIG. 8 is a schematic diagram of allocating feedback resources for a user equipment configured for multiplex transmission of an uplink control signal in a TDD system according to an embodiment of the present invention, where FIG. 8 is:

It is assumed that the data packet received by the user equipment includes four downlink subframes, which are respectively represented by downlink subframe 1, downlink subframe 2, downlink subframe 3, and downlink subframe 4, and the base station is in downlink subframe 1 and downlink subframe 2 Only one data packet is called, and the downlink subframe 1 and the downlink subframe 2 are respectively transmitted on the primary carrier. Therefore, the designated byte in the DL grant corresponding to the downlink subframe 1 and the downlink subframe 2 is "00". (that is, an implicit resource); and the base station invokes multiple data packets on the downlink subframe 3, so the designated byte in the DL grant corresponding to the downlink subframe 3 is "01" (that is, a non-implicit resource); The base station only calls one data packet in the downlink subframe 4, and the downlink subframe 4 transmits on the primary carrier. Although the downlink subframe 4 satisfies the use of the implicit resource, the DL grant of the previous downlink subframe 3 The specified byte in the middle is "01", therefore, the specified byte in the DL grant of the downlink subframe 4 is also "01". The user equipment transmits the uplink control signal corresponding to each scheduled downlink subframe in the uplink control channel resource corresponding to "01".

In the embodiment of the present invention, the specified byte in the DL grant is not limited to using the bits "00", "01", "10", "11" to indicate multiple uplink control channel resources allocated to the user equipment, and It can be implemented in other manners, such as carrying the number, name, and the like of the uplink control channel resource in the DL grant, and the implementation manner is various, and those skilled in the art should understand.

Based on the same concept of the foregoing method, the embodiment of the present invention further provides a base station and a user equipment. The structure diagrams of the base station and the user equipment are respectively shown in FIG. 9 and FIG.

FIG. 9 is a schematic structural diagram of a base station according to an embodiment of the present invention. The base station includes: a resource configuration unit 81, configured to: in the downlink subframe, indicate, in the downlink subframe, that the base station is in a specified uplink control channel resource set. An uplink control channel resource allocated by the user equipment, the designated uplink control channel resource set includes at least two types of uplink channel control resources, and each type of uplink control channel resource corresponds to an uplink control channel transmission format.

The first transceiver unit 82 is connected to the resource configuration unit 81, configured to transmit the PDCCH in the at least one downlink subframe, and configured to receive the uplink control signal fed back by the user equipment on the uplink control channel resource determined by the resource configuration unit 81. .

Preferably, the first transceiver unit 82 is further configured to transmit a downlink scheduling indication DL grant on the PDCCH, where the DL grant carries a designated byte for indicating an allocated uplink control channel resource for feeding back the uplink control signal; or The signaling for indicating the release of the semi-persistent scheduling SPS resource is transmitted, and the signaling indicating the release of the SPS resource carries a designated byte for indicating an allocated uplink control channel resource for feeding back the uplink control signal.

Preferably, the resource configuration unit 81 is further configured to: configure, by using a higher layer signaling, a first type of uplink control channel resource for the specified uplink control channel resource set; and the resource configuration unit configures the control channel corresponding to the first type of uplink control channel resource The transmission format is DFT-S-OFDM, PUCCH format lb with channel selection or PUCCH format la/lb.

Preferably, the resource configuration unit 81 is further configured to: configure a second type of uplink control channel resource for the specified uplink control channel resource set according to the CCE sequence number of the PDCCH; and configured to configure a control channel corresponding to the second type uplink control channel resource. The transport format is PUCCH format la/lb or PUCCH format lb with channel selection.

FIG. 10 is a schematic structural diagram of a user equipment according to an embodiment of the present disclosure, where the user equipment includes: The second transceiver unit 91 is configured to receive a PDCCH in the at least one downlink subframe that is sent by the base station, where the downlink subframe indicates that an uplink control channel resource allocated by the base station to the UE in the specified uplink control channel resource set, and the uplink is specified. The control channel resource set includes at least two types of uplink channel control resources, each type of uplink control channel resource corresponding to an uplink control channel transmission format; and, configured to feed back an uplink control signal in the uplink control channel resource selected by the resource determining unit;

The resource determining unit 92 is connected to the second transceiver unit 91, and configured to select an uplink control channel resource for feeding back an uplink control signal in an uplink control channel resource indicated by the at least one downlink subframe, or receive the PDCCH for receiving The signaling indicating the release of the SPS resource, the signaling indicating the release of the SPS resource carries a designated byte for indicating an allocated uplink control channel resource for feeding back the uplink control signal.

Preferably, the second transceiver unit 91 is further configured to receive a downlink scheduling indication DL grant on the PDCCH, where the DL grant carries a designated byte for indicating an allocated uplink control channel resource for feeding back the uplink control signal.

Preferably, the second transceiver unit 91 feeds back the uplink control signal in the uplink control channel resource selected by the resource determining unit 92, and the specific application is:

The uplink control signal is transmitted on the first type of uplink control channel resources determined by the resource determining unit by using the control channel transmission format DFT-S-〇FDM, PUCCH format lb with channel selection or PUCCH format la71b, and the first type of uplink control channel resources are used by the base station. Determined by high-level signaling configuration.

Preferably, the second transceiver unit 91 is further configured to transmit an uplink control signal on the second type of uplink control channel resource by using a control channel transmission format PUCCH format la/lb or PUCCH format lb with channel selection, and the second type of uplink control channel The resource is determined by the base station according to the sequence number of the control channel element CCE of the PDCCH.

Preferably, the resource determining unit 92 selects an uplink control channel resource for feeding back an uplink control signal, and the specific application is: determining uplink control channel resources for multiple uplink subframes, where the determined uplink control channel resources correspond to the same uplink subframe. If the determined uplink control channel resource includes at least one first type of uplink control channel resource, the second transceiver unit 91 uses the determined first type of uplink control channel resource. The latest uplink control channel resource transmits uplink control information.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowcharts and/or block diagrams, and combinations of flow and/or blocks in the flowcharts and/or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can operate in a particular manner by a computer or other programmable data processing device, such that instructions stored in the computer readable memory produce an article of manufacture including the instruction device. The instruction means implements the functions specified in one or more blocks of the flow or in a flow or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Although the preferred embodiment of the invention has been described, it will be apparent to those skilled in the < Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and modifications

In the embodiment of the present invention, the base station allocates multiple used for the user equipment semi-statically through the high layer signaling. Feeding control channel resources of the uplink control signal, and notifying the allocated multiple control channel resources to the user equipment; during data transmission, the base station allocates to the scheduled downlink subframe in the data packet sent to the user equipment A control channel resource for feeding back an uplink control signal is specified for the downlink subframe in the multiple control channel resources of the user equipment; the user equipment receives the data packet sent by the base station, and determines a corresponding uplink control signal; The corresponding control channel resource is selected from the specified control channel resources to feed back the uplink control signal to the base station. With the technical solution of the present invention, after decoding the received data packet, the user equipment determines an uplink control signal that needs to be fed back, and feeds back the uplink control signal by using the control channel resource specified by the base station, and does not need to be in each uplink carrier. The control channel resources for feeding back the uplink control signal are reserved for the corresponding downlink carrier. Therefore, the technical solution of the present invention fully utilizes the uplink control channel resources and improves the system transmission efficiency.

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of the inventions

Claims

Rights request

A method for determining a control channel resource transmission and a resource, the method includes: the base station indicating, in the at least one downlink subframe, an uplink control channel resource allocated by the base station to the user equipment in the specified uplink control channel resource set, where The specified uplink control channel resource set includes at least two types of uplink channel control resources, and each type of uplink control channel resource corresponds to one uplink control channel transmission format;

The base station transmits a downlink physical control channel PDCCH in the at least one downlink subframe; the base station receives an uplink control signal fed back by the UE on the allocated uplink control channel resource.

2. The method according to claim 1, wherein after the base station allocates an uplink control channel resource to the user equipment, the method further includes:

The base station transmits a downlink scheduling indication DL grant on the PDCCH, where the DL grant carries a designated byte for indicating an allocated uplink control channel resource for feeding back an uplink control signal; or, the base station transmits on the PDCCH for The signaling indicating the semi-persistent scheduling of the SPS resource release, the signaling indicating the SPS resource release carries a designated byte for indicating the allocated uplink control channel resource for feeding back the uplink control signal.

The method according to claim 1, wherein the specified uplink control channel resource set includes a first type of uplink control channel resource configured with high layer signaling;

The uplink control channel transmission format corresponding to the first type of uplink control channel resources includes: one of DFT-S-OFDM, PUCCH format lb with channel selection, and PUCCH format la/lb.

The method according to claim 3, wherein the specified uplink control channel resource set further comprises a second type of uplink control channel resource configured according to a sequence number of a control channel element CCE of the PDCCH;

The uplink control channel transmission format corresponding to the second type of uplink control channel resource is PUCCH format la/lb or PUCCH format lb with channel selection.

A method for determining control channel transmission and resources, comprising:

The user equipment UE receives the PDCCH in at least one downlink subframe sent by the base station, where the downlink subframe indicates an uplink control channel resource allocated by the base station to the UE in the specified uplink control channel resource set, and the designated uplink control channel resource The set includes at least two types of uplink channel control resources, and each type of uplink control channel resource corresponds to an uplink control channel transmission format;

And selecting, by the UE, an uplink control channel resource for feeding back an uplink control signal, by using an uplink control channel resource indicated by the at least one downlink subframe;

The UE feeds back an uplink control signal in the selected uplink control channel resource.

The method according to claim 5, wherein before the UE selects an uplink control channel resource, the method further includes:

Receiving, by the UE, a downlink scheduling indication DL grant sent by the base station, where the DL grant carries a designated byte for indicating an allocated uplink control channel resource for feeding back the uplink control signal; or

The UE receives, on the PDCCH, the signaling that is sent by the base station to indicate the release of the SPS resource, where the signaling indicating the release of the SPS resource carries a specified word for indicating the allocated uplink control channel resource for feeding back the uplink control signal. Section.

The method according to claim 5, wherein the specified uplink control channel resource set comprises a first type of uplink control channel resource configured by high layer signaling;

The uplink control channel transmission format corresponding to the first type of uplink control channel resource is one of DFT-S-OFDM. PUCCH format lb with channel selection and PUCCH format la/lb.

The method according to claim 7, wherein the specified uplink control channel resource set further comprises a second type of uplink control channel resource determined according to a control channel element CCE sequence of the PDCCH;

The method of claim 7, further comprising: determining, by the UE, uplink control channel resources for the plurality of uplink subframes, where the determined uplink control channel resources correspond to the same uplink subframe;

And if the determined uplink control channel resource includes at least one uplink control channel resource of the first type, the UE uses the latest uplink control channel resource of the determined first type of uplink control channel resource to transmit uplink control information.

A base station for controlling channel resource transmission and resource determination, comprising: a resource configuration unit, configured to, for the at least one downlink subframe, indicate, in the downlink subframe, that the base station is in a specified uplink control channel resource set An uplink control channel resource allocated by the user equipment, where the specified uplink control channel resource set includes at least two types of uplink channel control resources, and each type of uplink control channel resource corresponds to an uplink control channel transmission format;

a first transceiver unit, configured to transmit a downlink physical control channel in the at least one downlink subframe

a PDCCH; and, for receiving an uplink control signal fed back by the UE on the allocated uplink control channel resource.

The base station according to claim 10, wherein the first transceiver unit is further configured to: transmit a downlink scheduling indication DL grant on the PDCCH, where the DL grant carries a feedback uplink control for indicating allocation The specified byte of the uplink control channel resource of the signal; or,

The signaling for indicating the release of the semi-persistent scheduling SPS resource is transmitted on the PDCCH, and the signaling indicating the release of the SPS resource carries a designated byte for indicating an allocated uplink control channel resource for feeding back the uplink control signal.

The base station according to claim 10, wherein the resource configuration unit is further configured to: configure, by using a high layer signaling configuration, a first type of uplink control channel resource for the specified uplink control channel resource set;

The control channel transmission format corresponding to the first type of uplink control channel resources is DFT-S-OFDM, PUCCH format lb with channel selection, or PUCCH format la/lb.

The base station according to claim 12, wherein the resource configuration unit is further configured to: configure, according to a sequence of a control channel element CCE of the PDCCH, a second type of uplink control channel resource for the specified uplink control channel resource set ;

The control channel transmission format corresponding to the second type of uplink control channel resource is PUCCH format la/lb or PUCCH format lb with channel selection.

A user equipment for controlling channel resource transmission and resource determination, comprising: a second transceiver unit, configured to receive a physical downlink control channel PDCCH in at least one downlink subframe sent by a base station, the downlink subframe Indicates that there is an uplink control channel resource allocated by the base station to the UE in the specified uplink control channel resource set, where the specified uplink control channel resource set includes at least two types of uplink channel control resources, and each type of uplink control channel resource corresponds to one uplink control. a channel transmission format; and, configured to: feed back an uplink control signal in an uplink control channel resource selected by the resource determining unit; and the resource determining unit is configured to select, in the uplink control channel resource indicated by the at least one downlink subframe, a feedback Uplink control channel resource of the uplink control signal.

The user equipment according to claim 14, wherein the second transceiver unit is further configured to:

Receiving a downlink scheduling indication DL grant on the PDCCH, where the DL grant carries a designated byte for indicating an allocated uplink control channel resource for feeding back an uplink control signal; or

The signaling for indicating the release of the SPS resource is received on the PDCCH, and the signaling indicating the release of the SPS resource carries a specified byte for indicating an allocated uplink control channel resource for feeding back the uplink control signal.

The user equipment according to claim 15, wherein the second transceiver unit is specifically configured to:

Transmitting, by the resource determining unit, the uplink control signal on the first type of uplink control channel resource determined by the resource determining unit, by using one of a control channel transmission format, DFT-S-OFDM, PUCCH format lb with channel selection, and PUCCH format la/lb;

The first type of uplink control channel resources are determined by the base station by using a high layer signaling configuration.

The user equipment according to claim 16, wherein the second transceiver unit is further configured to:

Transmitting an uplink control signal on a second type of uplink control channel resource by using a control channel transmission format, PUCCH format la/lb or PUCCH format lb with channel selection;

The second type of uplink control channel resource is determined by the base station according to the sequence number of the control channel element CCE of the PDCCH.

The user equipment according to claim 16, wherein the resource determining unit is specifically configured to:

Determining an uplink control channel resource for the multiple uplink subframes, where the determined uplink control channel resource corresponds to the same uplink subframe; if the determined uplink control channel resource includes at least one first type uplink control channel resource, the second transceiver unit The uplink control information is transmitted by using the latest uplink control channel resource in the determined first type of uplink control channel resource.