CN103828281B - Descending sub frame feedback method, base station and user equipment - Google Patents

Descending sub frame feedback method, base station and user equipment Download PDF

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CN103828281B
CN103828281B CN201280002147.3A CN201280002147A CN103828281B CN 103828281 B CN103828281 B CN 103828281B CN 201280002147 A CN201280002147 A CN 201280002147A CN 103828281 B CN103828281 B CN 103828281B
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subframe
mrow
downlink
subframes
mbsfn
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CN103828281A (en
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李毓蕙
邴立东
刘洋
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements

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  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention relates to a kind of descending sub frame feedback method, and it, which is included in downlink physical control channel to user equipment, sends multiple descending sub frames, and the multiple descending sub frame includes multimedia broadcasting and multicast SFN MBSFN sub-frame；It is used to receive in ascending physical signal control channel in the multiple descending sub frame in the resource block of the ACK feedback information of non-MBSFN sub-frame, receives the user equipment after the multiple descending sub frame is received, the ACK feedback information of transmission.By method provided in an embodiment of the present invention, interface-free resources can be saved, improve up throughput.

Description

Downlink subframe feedback method, base station and user equipment
Technical Field
The present invention relates to the field of communications, and in particular, to a downlink subframe feedback method, a base station, and a user equipment.
Background
In a tdd scenario, a ue needs to feed back downlink subframes issued by multiple base stations in one uplink subframe, and therefore needs to allocate dynamic ACK channels to multiple downlink subframes. Currently, when calculating a Physical Uplink Control Channel (PUCCH) code Channel number under Long term evolution Time Division duplex (LTE TDD), dynamic Acknowledgement (ACK) corresponding to all downlink subframes is reserved. However, in a Multicast scenario, a Multicast Broadcast Single Frequency Network (MBSFN) subframe does not have a Physical Downlink Shared Channel (PDSCH) and downlink semi-static activation and release, and ACK feedback is not required, that is, the MBSFN subframe may not be considered in downlink ACK resource calculation.
Disclosure of Invention
The invention aims to provide a downlink subframe feedback method to reduce the air interface resources occupied by a control channel and achieve the purpose of saving the air interface resources.
In one aspect, an embodiment of the present invention provides a downlink subframe feedback method, where the method includes:
transmitting a plurality of downlink subframes to user equipment in a downlink physical control channel, wherein the plurality of downlink subframes comprise multimedia broadcast multicast single frequency network (MBSFN) subframes;
and receiving ACK feedback information sent by the user equipment after receiving the plurality of downlink subframes in a resource block used for receiving the ACK feedback information of the non-MBSFN subframe in the plurality of downlink subframes in an uplink physical control channel.
In another aspect, an embodiment of the present invention provides a downlink subframe feedback method, where the method includes:
receiving a plurality of downlink subframes sent by a base station in a downlink physical control channel, wherein the plurality of downlink subframes comprise MBSFN subframes;
and sending ACK feedback information of the non-MBSFN subframe in the plurality of downlink subframes to the base station in a resource block of an uplink physical control channel.
In another aspect, an embodiment of the present invention provides a base station, including:
a sending unit, configured to send a plurality of downlink subframes to a user equipment in a downlink physical control channel, where the plurality of downlink subframes include MBSFN subframes;
a receiving unit, configured to receive, in a resource block in an uplink physical control channel, ACK feedback information of a non-MBSFN subframe in the multiple downlink subframes, the ACK feedback information sent by the user equipment after receiving the multiple downlink subframes.
In another aspect, an embodiment of the present invention provides a user equipment, which includes:
a receiving unit, configured to receive a plurality of downlink subframes sent by a base station in a downlink physical control channel, where the plurality of downlink subframes include MBSFN subframes;
and a transmitting unit configured to transmit, to the base station, ACK feedback information of a non-MBSFN subframe of the plurality of downlink subframes in a resource block of an uplink physical control channel.
The embodiment of the invention provides a downlink subframe feedback method, wherein a base station does not reserve dynamic ACK resources for an MBSFN subframe under the condition that the MBSFN subframe is configured in the downlink subframe, so that empty resources occupied by a PUCCH are reduced, the uplink PUSCH bandwidth is expanded, and uplink throughput gain is brought.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a flowchart of a downlink subframe feedback method according to an embodiment of the present invention;
fig. 2 is a flowchart of a downlink subframe feedback method according to another embodiment of the present invention;
fig. 3 is a structural diagram of a base station according to an embodiment of the present invention;
fig. 4 is a structural diagram of a user equipment according to an embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
In the TDD-LTE system, the uplink physical control Channel PUCCH bandwidth is divided into three parts, namely, Channel Quality Indication (CQI) + semi-static ACK/uplink Scheduling Request Indication (SRI) + dynamic ACK), where the CQI and semi-static ACK/SRI resources are determined by product configuration and specification.
PUCCH bandwidth is calculated as follows, whereinIndicates the number of RBs occupied by the CQI,in the formulaAnd outside, are determined by the system configuration.
Wherein,
the number of the PUCCH maximum code channel is represented and is determined by the number of the PUCCH maximum code channel fed back by the downlink ACK; n is a radical ofcsFor cyclic shift numbers when PUCCH format 1/1a/1b coexists with PUCCH format 2/2a/2b on the same Resource Block (RB); △PUCCH shiftRepresenting the PUCCH cyclic shift interval.
For the TDD ACK feedback Multiplexing mode and M >1, the code channel number of the downlink ACK feedback PUCCH is calculated as follows:
wherein M represents the maximum uplink subframe number capable of being fed back by one uplink subframe, and Np +1 are subframes n-kiThe value range of p is {0,1,2,3}, so that N is the maximum value and the minimum value of the initial number of the control channel element CCEp≤nCCE,i<Np+1,nCCE,iIs a subframe n-K in the set of KiThe CCE starting position number used for PDCCH transmission,feedback configured by higher layers may use the start code lane number.
At present, when PUCCH code channel number is calculated under LTE TDD, dynamic ACK corresponding to all downlink subframes is reserved, and subframe n-k is calculated3The ACK code of (c) is actually (n)-k0)~(n-k2) And the dynamic ACK code channels are reserved in the three downlink subframes. If n-k0，n-k1，n-k2Any subframe is configured as an MBSFN subframe, and system PUCCH resources are wasted.
When the base station allocates the uplink PUSCH resource, the maximum bandwidth of the corresponding PUCCH needs to be acquired in order to avoid the resource block of the PUCCH. How to reduce the number of resources occupied by the PUCCH to increase the empty resources that the PUSCH can use is a problem to be solved by the present invention.
The Set K is related to the TDD uplink and downlink subframe ratio, i.e. corresponds to the K Set. Configuring an index K set (Downlink association set index) by time division duplex Downlink associationK:{k0,k1,…kM-1For TDD), Set K is determined by K Set herein.
As defined in table 1 below:
TABLE 1
When an evolved node B eNB allocates uplink PUSCH resources to user equipment UE, in order to avoid resource blocks RB of PUCCH, the maximum bandwidth of the corresponding PUCCH needs to be acquired. For determining the system configuration, only the dynamic ACK resources in the PUCCH bandwidth determined by the PUCCH maximum code channel number are variable.
Feedback Multiplexing mode for TDD ACK and M>1, the PUCCH code channel number of ACK feedback corresponding to downlink scheduling on the subframe n-Ki can be determined by a formulaAnd (6) obtaining. And the maximum PUCCH code number on subframe n can be derived.
Example (c): for TDD20M uplink and downlink subframe ratio 2, when the PDCCH is configured with 3 symbols, and on subframe No. 2, the PUCCH allocated for subframe n-6 (i.e. when k3 is taken) takes the CCE position number as the minimum value 0, the ACK minimum code channel number is:
Npucch+(4-3-1)*55+3*88+0=Npucch+264
when the CCE position number is taken as the maximum value 88, the ACK maximum code channel number in the PUCCH is:
Npucch+(4-3-1)*55+3*88+88=Npucch+352
that is, under this configuration, according to the specific CCE resource allocation of PDCCH on subframe n-6, the PUCCH maximum code channel number on subframe No. 2 is between Npucch +264 and Npucch + 352.
However, in a multicast scenario, downlink PDSCH channels and downlink semi-static activation and release do not exist in the MBSFN subframe, and ACK feedback is not required, that is, the MBSFN subframe may not be considered in downlink ACK resource calculation, so that PUCCH resources are saved, PUSCH resources are expanded, and uplink throughput can be improved.
The core idea of the embodiment of the invention is as follows: when the system configures the MBSFN subframe, the corresponding uplink feedback subframe does not reserve dynamic ACK resources for the MBSFN subframe.
An embodiment of the present invention provides a downlink subframe feedback method, in which an execution subject is an evolved node b (eNB), and fig. 1 is a flowchart of a downlink subframe feedback method provided in an embodiment of the present invention, where the method includes:
s101, sending a plurality of downlink subframes to user equipment in a downlink physical control channel, wherein the downlink subframes comprise multimedia broadcast multicast single frequency network (MBSFN) subframes;
specifically, a base station sends a downlink subframe to a UE in a PDCCH, and particularly in a system supporting enhanced multimedia broadcast/multicast service (eMBMS), in order to support the eMBMS, a multimedia broadcast/multicast single frequency network (MBSFN) subframe is introduced, and the subframe does not need ACK feedback of user equipment, so that when resources are allocated, feedback resources do not need to be reserved for the MBSFN subframe.
S102, in a resource block of an uplink physical control channel for receiving ACK feedback information of non-MBSFN subframes in the plurality of downlink subframes, receiving that the user equipment sends the ACK feedback information after receiving the plurality of downlink subframes.
For the base station, after the downlink subframe is sent, the air interface resource occupied by the UE when the UE feeds back the ACK is calculated, and the ACK feedback information is received at the corresponding resource position. For example, the first K value corresponding to the MBSFN subframe in the K set corresponding to the uplink subframe for performing ACK feedback on the downlink subframe of one non-MBSFN subframe of the downlink subframes is removed; updating the sequence numbers corresponding to the K values which are left in the K set after the first K value is removed; and calculating the ACK feedback resource code channel number corresponding to each downlink subframe in the plurality of downlink subframes according to the sequence number corresponding to the residual K value so as to determine the resource block.
I.e. if sub-frame n-kiConfigured as MBSFN subframe, then k isiExcluded from set K, such as for uplink and downlink subframe ratio 2, if subframe No. 4 is configured as an MBSFN subframe, table 1 may become:
TABLE 2
The formula for calculating the code track number remains:
wherein M represents the maximum uplink subframe number capable of being fed back by one uplink subframe, and Np +1 are subframes n-kiThe value range of p is {0,1,2,3}, so that N is the maximum value and the minimum value of the initial number of the control channel element CCEp≤nCCE,i<Np+1 nCCE，iIs a subframe n-K in the set of KiForThe CCE starting position number of the PDCCH transmission,feedback configured by higher layers may use the start code lane number.
Therefore, in subframe No. 2, when the CCE position number is taken as the minimum value 0, the ACK minimum code channel number of the PUCCH allocated to subframe n-6 (i.e., k2) is:
Npucch+(3-2-1)*55+2*88+0=Npucch+176
taking the CCE position number as the maximum value 88, and the PUCCH ACK maximum code channel number as:
Npucch+(3-2-1)*55+2*88+88=Npucch+264
that is, according to the specific CCE resource allocation of the PDCCH on subframe No. n-6, the PUCCH maximum code channel number on subframe No. 2 is between Npucch +176 and Npucch + 264.
Then, for the uplink feedback subframe corresponding to the MBSFN subframe, the PUCCH channel part dynamically ACK reserves resources, which can extend the uplink PUSCH bandwidth and bring the gain of uplink throughput.
For example, in the above embodiment, it is assumed that the PUCCH cyclic shift interval is ds2, the subframe is a normal subframe, and the maximum number 4 of the PUCCH format 1 is reduced from Npucch +352 to Npucch +264, which is reduced by 88.
Accordingly, the following formula,
it follows that the corresponding m value is decreased by (88 × ds2)/(3 × 12) ≈ 4.89, i.e. each uplink subframe may be extended by 6 PUSCHRB, with an increase of about 45Kbits per second throughput.
Fig. 2 is a flowchart of a downlink subframe feedback method according to an embodiment of the present invention, where an execution subject in the embodiment is a user equipment UE. As can be seen from fig. 2, the method includes:
s201, receiving a plurality of downlink subframes sent by a base station in a downlink physical control channel, wherein the plurality of downlink subframes comprise MBSFN subframes;
s202, sending ACK feedback information of non-MBSFN subframes in the plurality of downlink subframes to the base station in a resource block of an uplink physical control channel.
Specifically, after the UE receives the downlink subframe, it calculates the air interface resource occupied by the UE when feeding back the ACK, and sends the ACK feedback information at the corresponding resource location. That is to say, the UE removes the first K value corresponding to the MBSFN subframe in the K set corresponding to the uplink subframe for performing ACK feedback on the downlink subframe of one non-MBSFN subframe of the downlink subframes; updating the sequence numbers corresponding to the K values which are left in the K set after the first K value is removed; and calculating the ACK feedback resource code channel number corresponding to each downlink subframe in the plurality of downlink subframes according to the sequence number corresponding to the residual K value so as to determine the resource block.
By the embodiment, for the uplink feedback subframe corresponding to the MBSFN subframe, the resource is reserved by the PUCCH channel part dynamic ACK, the uplink PUSCH bandwidth can be expanded, and the gain of the uplink throughput is brought.
Correspondingly, referring to fig. 3, an embodiment of the present invention further provides a base station, where fig. 3 is a structural diagram of the base station, where the base station includes:
a transmitting unit 301, configured to transmit a plurality of downlink subframes to a user equipment in a downlink physical control channel, where the plurality of downlink subframes include MBSFN subframes;
a receiving unit 302, configured to receive, in a resource block in an uplink physical control channel, the ACK feedback information of the non-MBSFN subframe in the multiple downlink subframes, and send the ACK feedback information after receiving the multiple downlink subframes by the user equipment.
Optionally, the position of the resource block may be determined by the resource block determining unit, and when calculating the ACK feedback resource code channel number corresponding to each downlink subframe that is not an MBSFN subframe, the resource block determining unit removes the K value corresponding to the MBSFN subframe in the K set, updates the sequence number corresponding to the remaining K value, and calculates the ACK feedback resource code channel number according to the updated sequence number to obtain the position of the resource block.
Correspondingly, as shown in fig. 4, an embodiment of the present invention further provides a user equipment, where the user equipment includes:
a receiving unit 401, configured to receive a plurality of downlink subframes sent by a base station in a downlink physical control channel, where the plurality of downlink subframes include MBSFN subframes;
a transmitting unit 402, configured to transmit, to the base station, ACK feedback information of a non-MBSFN subframe of the multiple downlink subframes in a resource block of an uplink physical control channel.
Optionally, the user equipment may calculate, by using the resource block determination unit, an ACK feedback resource channel number corresponding to each downlink subframe, and the resource block determination unit removes a first K value corresponding to an MBSFN subframe in a K set corresponding to an uplink subframe for performing ACK feedback on a downlink subframe of a non-MBSFN subframe of the plurality of downlink subframes; updating the sequence numbers corresponding to the K values which are left in the K set after the first K value is removed; and calculating the ACK feedback resource code channel number corresponding to each downlink subframe in the plurality of downlink subframes according to the sequence number corresponding to the residual K value so as to determine the resource block.
Those of skill would further appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied in hardware, a software module executed by a processor, or a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (6)

1. A downlink subframe feedback method is characterized in that the method comprises the following steps:
transmitting a plurality of downlink subframes to user equipment in a downlink physical control channel, wherein the plurality of downlink subframes comprise multimedia broadcast multicast single frequency network (MBSFN) subframes;
receiving ACK feedback information sent by the user equipment after receiving the plurality of downlink subframes in a resource block used for receiving ACK feedback information of non-MBSFN subframes in the plurality of downlink subframes in an uplink physical control channel, wherein the ACK feedback information resource block of the MBSFN subframes is not reserved in the uplink physical control channel;
the resource block is determined by:
removing a first K value corresponding to the MBSFN subframe from a K set corresponding to an uplink subframe for performing ACK feedback on a downlink subframe of a non-MBSFN subframe in the plurality of downlink subframes;
updating the sequence numbers corresponding to the K values which are left in the K set after the first K value is removed;
and calculating the ACK feedback resource code channel number corresponding to each downlink subframe in the plurality of downlink subframes according to the updated sequence number corresponding to the residual K value so as to determine the resource block.
2. The downlink subframe feedback method of claim 1 wherein the ACK feedback resource code channel number is calculated by the following formula:
<mrow> <msubsup> <mi>n</mi> <mrow> <mi>P</mi> <mi>U</mi> <mi>C</mi> <mi>C</mi> <mi>H</mi> <mo>,</mo> <mi>i</mi> </mrow> <mrow> <mo>(</mo> <mn>1</mn> <mo>)</mo> </mrow> </msubsup> <mo>=</mo> <mrow> <mo>(</mo> <mi>M</mi> <mo>-</mo> <mi>i</mi> <mo>-</mo> <mn>1</mn> <mo>)</mo> </mrow> <mo>&amp;times;</mo> <msub> <mi>N</mi> <mi>p</mi> </msub> <mo>+</mo> <mi>i</mi> <mo>&amp;times;</mo> <msub> <mi>N</mi> <mrow> <mi>p</mi> <mo>+</mo> <mn>1</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>n</mi> <mrow> <mi>C</mi> <mi>C</mi> <mi>E</mi> <mo>,</mo> <mi>i</mi> </mrow> </msub> <mo>+</mo> <msubsup> <mi>N</mi> <mrow> <mi>P</mi> <mi>U</mi> <mi>C</mi> <mi>C</mi> <mi>H</mi> </mrow> <mrow> <mo>(</mo> <mn>1</mn> <mo>)</mo> </mrow> </msubsup> </mrow>
wherein, M represents the maximum uplink subframe number that can be fed back by one uplink subframe, i is the subframe index value in the K set, and N is the maximum uplink subframe number in the K setpAnd Np+1For sub-frame n-kiThe value range of p is {0,1,2,3}, so that N is the minimum value and the maximum value of the number of the initial position of the control channel element CCEp≤nCCE,i＜Np+1, Is the number of RB (resource block) of the downlink bandwidth of the current system, nCCE,iIs a subframe n-K in the set of KiCCE starting position number for PDCCH transmission, n is the current subframe number, KiIs the index value in the set of K,indicating the available start code lane number for feedback configured by higher layers.
3. A downlink subframe feedback method is characterized in that the method comprises the following steps:
receiving a plurality of downlink subframes sent by a base station in a downlink physical control channel, wherein the plurality of downlink subframes comprise multimedia broadcast multicast single frequency network (MBSFN) subframes;
sending ACK feedback information of non-MBSFN subframes in the plurality of downlink subframes to the base station in a resource block of an uplink physical control channel, wherein the ACK feedback information resource block of the MBSFN subframes is not reserved in the uplink physical control channel;
the resource block is determined by:
removing a first K value corresponding to the MBSFN subframe from a K set corresponding to an uplink subframe for performing ACK feedback on a downlink subframe of a non-MBSFN subframe in the plurality of downlink subframes;
updating the sequence numbers corresponding to the K values which are left in the K set after the first K value is removed;
and calculating the ACK feedback resource code channel number corresponding to each downlink subframe in the plurality of downlink subframes according to the updated sequence number corresponding to the residual K value so as to determine the resource block.
4. The downlink subframe feedback method of claim 3 wherein the ACK feedback resource code channel number is calculated by the following formula:
<mrow> <msubsup> <mi>n</mi> <mrow> <mi>P</mi> <mi>U</mi> <mi>C</mi> <mi>C</mi> <mi>H</mi> <mo>,</mo> <mi>i</mi> </mrow> <mrow> <mo>(</mo> <mn>1</mn> <mo>)</mo> </mrow> </msubsup> <mo>=</mo> <mrow> <mo>(</mo> <mi>M</mi> <mo>-</mo> <mi>i</mi> <mo>-</mo> <mn>1</mn> <mo>)</mo> </mrow> <mo>&amp;times;</mo> <msub> <mi>N</mi> <mi>p</mi> </msub> <mo>+</mo> <mi>i</mi> <mo>&amp;times;</mo> <msub> <mi>N</mi> <mrow> <mi>p</mi> <mo>+</mo> <mn>1</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>n</mi> <mrow> <mi>C</mi> <mi>C</mi> <mi>E</mi> <mo>,</mo> <mi>i</mi> </mrow> </msub> <mo>+</mo> <msubsup> <mi>N</mi> <mrow> <mi>P</mi> <mi>U</mi> <mi>C</mi> <mi>C</mi> <mi>H</mi> </mrow> <mrow> <mo>(</mo> <mn>1</mn> <mo>)</mo> </mrow> </msubsup> </mrow>
wherein M represents the most feedback-capable uplink subframeThe number of large uplink subframes, i is the subframe index value in the K set, NpAnd Np+1For sub-frame n-kiThe value range of p is {0,1,2,3}, so that N is the minimum value and the maximum value of the number of the initial position of the control channel element CCEp≤nCCE,i＜Np+1, Is the number of RB (resource block) of the downlink bandwidth of the current system, nCCE,iIs a subframe n-K in the set of KiCCE starting position number for PDCCH transmission, n is the current subframe number, KiIs the index value in the set of K,indicating the available start code lane number for feedback configured by higher layers.
5. A base station, comprising:
a sending unit, configured to send a plurality of downlink subframes to a user equipment in a downlink physical control channel, where the plurality of downlink subframes include multimedia broadcast multicast single frequency network (MBSFN) subframes;
a receiving unit, configured to receive, in a resource block in an uplink physical control channel, ACK feedback information sent by the user equipment after receiving the multiple downlink subframes, where the resource block in the uplink physical control channel is used for receiving ACK feedback information of a non-MBSFN subframe in the multiple downlink subframes, and the resource block in the uplink physical control channel is not reserved for the ACK feedback information of the MBSFN subframe;
further comprising a resource block determination unit configured to:
removing a first K value corresponding to the MBSFN subframe from a K set corresponding to an uplink subframe for performing ACK feedback on a downlink subframe of a non-MBSFN subframe in the plurality of downlink subframes;
updating the sequence numbers corresponding to the K values which are left in the K set after the first K value is removed;
and calculating the ACK feedback resource code channel number corresponding to each downlink subframe in the plurality of downlink subframes according to the updated sequence number corresponding to the residual K value so as to determine the resource block.
6. A user device, comprising:
the device comprises a receiving unit, a transmitting unit and a receiving unit, wherein the receiving unit is used for receiving a plurality of downlink subframes sent by a base station in a downlink physical control channel, and the downlink subframes comprise multimedia broadcast multicast single frequency network (MBSFN) subframes;
a transmitting unit, configured to transmit, to the base station, ACK feedback information of a non-MBSFN subframe of the multiple downlink subframes in a resource block of an uplink physical control channel, where the ACK feedback information resource block of the MBSFN subframe is not reserved in the uplink physical control channel;
further comprising a resource block determination unit configured to:
removing a first K value corresponding to the MBSFN subframe from a K set corresponding to an uplink subframe for performing ACK feedback on a downlink subframe of a non-MBSFN subframe in the plurality of downlink subframes;
updating the sequence numbers corresponding to the K values which are left in the K set after the first K value is removed;
and calculating the ACK feedback resource code channel number corresponding to each downlink subframe in the plurality of downlink subframes according to the updated sequence number corresponding to the residual K value so as to determine the resource block.
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