CN116800386A - PUCCH demodulation method and device and base station - Google Patents

PUCCH demodulation method and device and base station Download PDF

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Publication number
CN116800386A
CN116800386A CN202310822566.1A CN202310822566A CN116800386A CN 116800386 A CN116800386 A CN 116800386A CN 202310822566 A CN202310822566 A CN 202310822566A CN 116800386 A CN116800386 A CN 116800386A
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CN
China
Prior art keywords
resource set
pucch resource
uci
pucch
base station
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CN202310822566.1A
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Chinese (zh)
Inventor
周璐璐
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Xi'an Baopu Communication Technology Co ltd
Raisecom Technology Co Ltd
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Xi'an Baopu Communication Technology Co ltd
Raisecom Technology Co Ltd
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Priority to CN202310822566.1A priority Critical patent/CN116800386A/en
Publication of CN116800386A publication Critical patent/CN116800386A/en
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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
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Abstract

The embodiment of the application discloses a PUCCH demodulation method, a PUCCH demodulation device and a base station. The method comprises the following steps: acquiring a theoretical value of the bit number of uplink control information UCI sent by User Equipment (UE), wherein the theoretical value is determined at least according to the times of downlink control information DCI sent by a base station in a hybrid automatic repeat request (HARQ) feedback window; determining a physical layer uplink control channel (PUCCH) resource set matched with the theoretical value to obtain a PUCCH resource set i; when the theoretical value is larger than a preset threshold value, the received HARQ response is respectively demodulated by using the PUCCH resource set i and the PUCCH resource set i-1; when the UCI only carries HARQ response, the threshold is the maximum value N1 of UCI load of PUCCH resource set 0; where i=1, 2,3.

Description

PUCCH demodulation method and device and base station
Technical Field
The embodiment of the application relates to the field of mobile communication, in particular to a PUCCH demodulation method and device and a base station.
Background
In order to realize more flexible resource allocation, NR (New Rado, new generation wireless communication 5G) introduces a concept of resource set on the basis of PUCCH (Physical Uplink Control Channel, physical layer uplink control channel) resources. The effect of the introduced PUCCH resource set is: the UE (User Equipment) may select a suitable PUCCH resource according to UCI (Uplink Control Information ) payload without increasing the cost of DCI (Downlink Control Information ). Fig. 1 is a schematic diagram of a PUCCH resource set. As shown in fig. 1, the UE may configure at most 4 PUCCH resource sets (0, 1,2, 3), each corresponding to one UCI payload range. The first PUCCH resource set (PUCCH Resource Set ID =0) corresponds to UCI payload of 1-2 bits and contains at most 32 PUCCH resources; UCI payload corresponding to the last three PUCCH resource sets (PUCCH Resource Set ID =1, PUCCH Resource Set ID =2, PUCCH Resource Set ID =3) is delimited by N2 and N3, and includes at most 8 PUCCH resources. If the second PUCCH resource set (PUCCH Resource Set ID =1) configures Max Payload Size, n2=max Payload Size, n3= (Max Payload Size) ×4. Where N2 and N3 are configured by higher layer signaling.
After the UE obtains the PUCCH resource set configuration, if the feedback UCI includes HARQ (Hybrid Automatic Repeat request ) ACK, the PUCCH resource set may be selected according to the UCI payload size by itself. The method comprises the following steps:
if the UCI bit number required to be sent by the UE is less than or equal to 2, the UE selects a PUCCH resource set 0;
if the UCI bit number required to be sent by the UE is greater than N1 and less than or equal to N2, the UE selects a PUCCH resource set 1;
if the UCI bit number required to be sent by the UE is greater than N2 and less than or equal to N3, the UE selects a PUCCH resource set 2;
if the number of UCI bits that the UE needs to transmit is greater than N3 and less than or equal to 1706 (Nmax), the UE selects PUCCH resource set 3;
after the UE selects the PUCCH resource set according to the UCI bit number to be transmitted, it is also required to select which resource in the specific use resource set. The PUCCH resource is selected based on the PRI (PUCCH Resource Indicator, PUCCH resource indication field) in the last DCI transmitted by the base station in one HARQ feedback window.
However, due to instability of the wireless transmission environment, it may occur that the number of bits of UCI including HARQ ACK (HARQ acknowledgement) expected to be received by the base station according to the number of times of transmitting DCI within one HARQ feedback window is not the same as the number of bits of UCI including HARQ ACK actually received but is greater than the number of bits of UCI including HARQ ACK actually received, and at this time, the PUCCH resource set reserved by the base station according to the number of bits of UCI expected to be received for the UE and the PUCCH resource set actually used by the UE will not be the same, and thus, the PUCCH demodulation will fail. For example, if the base station sends 3 DCIs within one HARQ feedback window, the base station expects the UE to feed back 3bits of HARQ ACK to select resource set 1, so that one PUCCH resource in PUCCH resource set 1 is reserved for the UE and PUCCH is demodulated on the corresponding resource, but if the UE receives only 2 DCIs, the 3 rd DCI is missed, the UE can only parse 2 PDSCH (Downlink Shared Channel, physical downlink shared channel)) data, so that the UE feeds back only 2bits of HARQ ACK, then one PUCCH resource in PUCCH resource set 0 is selected to send HARQ ACK, and at this time, the PUCCH resource used by the UE is inconsistent with the expected PUCCH resource of the base station, and the PUCCH demodulation failure occurs.
Disclosure of Invention
In order to solve any technical problem, the embodiment of the application provides a PUCCH demodulation method and device and a base station.
In order to achieve the purpose of the embodiment of the present application, an embodiment of the present application provides a PUCCH demodulation method, including:
acquiring a theoretical value of the bit number of UCI (uplink control channel) sent by UE (user equipment), wherein the theoretical value is determined at least according to the times of DCI (downlink control information) sent by a base station in an HARQ feedback window;
determining a PUCCH resource set matched with the theoretical value to obtain a PUCCH resource set i;
when the theoretical value is larger than a preset threshold value, the received HARQ ACK is respectively demodulated by using the PUCCH resource set i and the PUCCH resource set i-1;
when the UCI only carries HARQ ACK, the threshold is a maximum value N1 of UCI load of PUCCH resource set 0;
where i=1, 2,3.
A PUCCH demodulation device applied to a base station side, the device comprising:
the acquisition module is used for acquiring a theoretical value of the bit number of UCI (uplink control information) sent by the UE, wherein the theoretical value is determined at least according to the times of DCI (downlink control information) sent by the base station in one HARQ feedback window;
the determining module is used for determining the PUCCH resource set matched with the theoretical value to obtain a PUCCH resource set i;
the demodulation module is used for demodulating the HARQ response by using the PUCCH resource set i and the PUCCH resource set i-1 respectively when the theoretical value is larger than a preset threshold value;
when the UCI only carries HARQ response, the threshold is the maximum value N1 of UCI load of PUCCH resource set 0;
where i=1, 2,3.
A storage medium having a computer program stored therein, wherein the computer program is arranged to perform the method described above when run.
An electronic device comprising a memory having stored therein a computer program and a processor arranged to run the computer program to perform the method described above.
One of the above technical solutions has the following advantages or beneficial effects:
the received HARQ ACK is demodulated by using the PUCCH resource set i matched with the theoretical value of the UCI bit number, and the received HARQ ACK is demodulated by using the PUCCH resource set i-1, so that the aim of demodulating the HARQ ACK by using two PUCCH resource sets is fulfilled, demodulation failure caused by different PUCCH resource sets reserved by a base station and PUCCH resource sets actually used by UE is avoided, and the demodulation success rate is improved.
Additional features and advantages of embodiments of the application will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of embodiments of the application. The objectives and other advantages of embodiments of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the technical solution of the embodiments of the present application, and are incorporated in and constitute a part of this specification, illustrate and explain the technical solution of the embodiments of the present application, and not to limit the technical solution of the embodiments of the present application.
Fig. 1 is a schematic diagram of a PUCCH resource set;
fig. 2 is a flowchart illustrating a PUCCH demodulation method according to an embodiment of the present application;
fig. 3 is another flow chart of a PUCCH demodulation method according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a PUCCH demodulation device according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the embodiments of the present application will be described in detail hereinafter with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be arbitrarily combined with each other.
When the base station transmits DCI, the PUCCH resource ID used by the UE feedback HARQ ACK is indicated in the DCI, but this PUCCH resource ID is not indicated in which PUCCH resource set is located. The specific PUCCH resource set used by the UE is that the UE selects the resource set according to the number of bits to be fed back by itself.
When the base station reserves a PUCCH resource set for the UE according to the expected received UCI bit number and the PUCCH resource set actually used by the UE are different, the situation of PUCCH demodulation failure can occur. Aiming at the technical problems, the embodiment of the application provides the following solutions, which comprise the following steps:
fig. 2 is a flowchart illustrating a PUCCH demodulation method according to an embodiment of the present application. As shown in fig. 2, the method is applied to a base station side, and includes:
step 201, obtaining a theoretical value of the bit number of UCI sent by UE, wherein the theoretical value is determined at least according to the number of times of DCI sent by a base station in one HARQ feedback window;
step 202, determining a PUCCH resource set matched with the theoretical value to obtain a PUCCH resource set i;
step 203, when the theoretical value is greater than a preset threshold value, demodulating the received HARQ ACK by using the PUCCH resource set i and the PUCCH resource set i-1 respectively;
when the UCI only carries HARQ ACK, the threshold is a maximum value N1 of UCI load of PUCCH resource set 0; where i=1, 2,3.
The method provided by the embodiment of the application not only demodulates the received HARQ ACK by using the PUCCH resource set i matched with the theoretical value of the bit number of UCI, but also demodulates the received HARQ ACK by using the PUCCH resource set i-1, thereby realizing the purpose of demodulating the HARQ ACK by using two PUCCH resource sets respectively, avoiding demodulation failure caused by different PUCCH resource sets reserved by a base station and PUCCH resource sets actually used by UE, and improving the demodulation success rate.
The following describes the method provided by the embodiment of the application:
in an exemplary embodiment, the UCI further carries control data other than HARQ ACK, wherein the control data includes at least one of first sub-control data having no corresponding bit transmission information in UCI and second sub-control data having corresponding bit transmission information in UCI; wherein:
when the control data is first sub-control data, the threshold is the maximum value N1 of UCI load of the PUCCH resource set 0;
when the control data is second sub-control data, or when the control data includes first sub-control data and second sub-control data, the threshold is a maximum value N2 of UCI load of PUCCH resource set 1.
Specifically, the uplink control information UCI sent by the UE through the PUCCH may include, in addition to HARQ ACK: SR (Scheduling Request ) for the UE to send UL scheduling grant (DCI Format 0_0/0_1) to the network request so that the UE can transmit data on PUSCH channel; and CSI (Channel State Information ), including CQI (Channel Quality Indication, channel quality Indication), PMI (Precoding Matrix Indicator, precoding matrix Indication), RI (Rank Indication), etc., for telling the base station of downlink channel quality, etc., to help the base station perform downlink scheduling. The base station MAC (Medium Access Control, access control) layer can know what UCI is fed back on the PUCCH of a certain uplink slot through the configuration information of the RRC (Radio Resource Control ) layer on the SR and CSI and the scheduling information in the DCI, and each feedback may be to feed back only a UCI of a certain UCI according to an actual scenario, or may be to feed back a combination of multiple UCI simultaneously.
Further, the first sub control data is SR; the second sub-control data is Channel State Information (CSI).
Correspondingly, when the control data is CSI, or when the control data includes CSI and SR, the theoretical value is determined according to the number of times of DCI transmission and the number of bits of CSI fed back by the UE set by the base station.
In an exemplary embodiment, the PUCCH resource set i is obtained by a method including:
if the theoretical value is greater than a maximum value N1, the PUCCH resource set i is a PUCCH resource set 1;
if the theoretical value is greater than the maximum value N2 and is less than or equal to the maximum value N3 of UCI load of the PUCCH resource set 2, the PUCCH resource set i is the PUCCH resource set 2;
and if the theoretical value is greater than the maximum value N3, the PUCCH resource set i is the PUCCH resource set 3.
Preferably, demodulating the received HARQ ACK with the PUCCH resource set i and the PUCCH resource set i-1 respectively includes:
when UCI carries DCI only, the received HARQ ACK is demodulated in PUCCH resource set i and PUCCH resource set i-1 respectively in the nth 1 st time and every subsequent downlink scheduling in the HARQ feedback window.
Since the actual received HARQ ACK is different from the UCI bits expected to be received by the base station in the nth 1 th and each subsequent downlink scheduling in the HARQ feedback window, there is no need to demodulate the HARQ ACK respectively received by using the two resource sets in each downlink scheduling before the nth 1 th, and only the received HARQ ACK is demodulated in the PUCCH resource set i and the PUCCH resource set i-1 in each downlink scheduling after the nth 1 th and each downlink scheduling in the HARQ feedback window.
Optionally, the method further comprises:
and when the theoretical value is smaller than or equal to the threshold value, only demodulating the received HARQ ACK by using the PUCCH resource set corresponding to the threshold value.
The technical scheme of the present application will be described in detail with reference to more specific embodiments.
Referring to fig. 3, a PUCCH demodulation method according to an embodiment of the present application is applied to a base station, where the base station sends DCI, where the DCI is a single codeword, uses an HARQ dynamic codebook and is not configured for CBG (Code Block Group) transmission, and then performs the following steps:
step 100: judging whether the UE only feeds back the HARQ ACK on the PUCCH on the HARQ feedback time slot corresponding to the downlink scheduling, if so, executing the step 101, and if not, executing the step 102;
in this step, the HARQ ACK fed back by the UE on the PUCCH includes: the UE feeds back a positive Acknowledgement (ACK) when decoding a Physical Downlink Shared Channel (PDSCH) (Physical Downlink Shared Channel) successfully according to time-frequency resources indicated by the received DCI information, and feeds back a Negative Acknowledgement (NACK) when decoding the PDSCH fails;
in general, in an NR system, a base station indicates downlink time-frequency resource scheduling of a UE through DCI1_0 or DCI 1_1; the base station also indicates the time interval between receiving the DCI and feeding back the HARQ ACK by the UE through the DCI, so that the base station knows in which time slot the HARQ ACK scheduled by the UE for the time is fed back to the base station when the DCI is sent.
A point is also described for this step: in this step, the base station determines whether only HARQ ACK is included in UCI to make different operations;
step 301: judging whether the DCI number of times sent in one HARQ feedback window is less than or equal to N1, if so, executing step 303; if not, go to step 304;
wherein, the value of N1 can be 2;
in TDD (Time Division Duplex ) systems, for a frame structure with more downlink time slots than uplink time slots, HARQ ACK feedback corresponding to downlink transmission of multiple downlink time slots may need to be transmitted through PUCCH of the same uplink time slot, and the set of downlink time slots is called a HARQ feedback window. That is, if feedback slots of HARQ ACKs indicated in consecutive several DCIs are the same uplink slot, the several downlink schedules are located within one HARQ feedback window.
In this step, the base station accumulates the number of transmissions by +1 every time one DCI is transmitted in one HARQ feedback window.
Step 302: judging whether the HARQ ACK and the CSI are fed back simultaneously in one HARQ feedback window, if so, executing step 305, and if not, executing step 301;
in the application scenario of the UE, simultaneous feedback SR and/or CSI may also occur when the UE feeds back HARQ ACK. In this step, if HARQ ACK and CSI are not fed back simultaneously in one HARQ feedback window, but HARQ ACK and SR are fed back simultaneously, since SR itself does not carry additional information, and does not occupy the number of bits, when UE feeds back HARQ ACK and SR simultaneously, the number of overall bits is consistent with that of HARQ ACK fed back alone, and step 301 is still executed at this time;
step 303: reserving one resource only on the PUCCH resource set 0, and demodulating the received HARQ ACK on the reserved resource;
in this step, if the number of times of transmitting DCI in one HARQ feedback window is less than or equal to 2, the base station expects the UE to use PUCCH resources in PUCCH resource set 0, even if DCI omission occurs in the UE, the number of HARQ ACK bits fed back by the UE is also less than or equal to 2, and the UE must select one resource in PUCCH resource set 0, which is not different from that expected at the base station side. So the base station reserves only one resource in PUCCH resource set 0 at this time, and PUCCH demodulation is also successful.
Step 304: 2 PUCCH resources are reserved in the 3 rd time and each subsequent time of downlink scheduling in the HARQ feedback window, one resource is reserved in the PUCCH resource set 0 and the PUCCH resource set 1 respectively, and the received HARQ ACK is demodulated.
In this step, which resource is reserved on PUCCH resource set 0 and which resource is reserved on PUCCH resource set 1 are processed according to the prior art, and the present application is not limited thereto.
In this step, since the received HARQ ACK is demodulated on one resource in the PUCCH resource set 0 and one resource in the PUCCH resource set 1, if the data transmission between the base station and the UE is completely normal, the UE will use the PUCCH resource in the resource set 1 to demodulate the DCI transmitted by the base station in one HARQ feedback window more than N1 times, so that the base station will demodulate the HARQ ACK on one PUCCH resource in the PUCCH resource set 1 successfully; if the DCI missed detection occurs at the UE side, that is, if the number of DCI issued by the base station detected by the UE is less than 3, at this time, for example, 2bits HARQ ACK is fed back, at this time, the base station demodulates the HARQ ACK on one PUCCH resource in the PUCCH resource set 0, and will be successfully demodulated; therefore, the problem of HARQ ACK demodulation failure can be effectively avoided.
Step 305: judging whether the received (number of HARQ ACK bits+number of CSI bits) is larger than N1 but smaller than or equal to N2 or not in one HARQ feedback window, if yes, executing step 306, and if not, executing step 307;
in this step, the base station determines the number of bits of the HARQ ACK to be received according to the number of times of DCI transmission in one HARQ feedback window; and the number of bits of the received CSI is determined by the base station MAC layer according to the RRC higher layer configuration.
Step 306: reserving a PUCCH resource on the PUCCH resource set 1 only, and demodulating the received HARQ ACK;
since the typical configuration of CSI is composed of CQI, PMI and RI, the number of bits of PMI and RI is also related to other parameters according to 3GPP protocol, but the number of bits of CQI is at least 4, so when CSI and HARQ ACK are fed back simultaneously, the overall number of bits fed back by UE is necessarily greater than N1 even if DCI omission occurs, so UE uses one resource in resource set 1, base station expects resource set 1, and at this time, the base station only needs to reserve one resource in resource set 1.
Step 307: it is determined whether the number of HARQ ACK bits + the number of CSI bits fed back in one HARQ feedback window is less than or equal to N3, if yes, step 308 is performed, and if no, step 309 is performed.
Step 308, reserving one resource on each of the PUCCH resource set 1 and the PUCCH resource set 2 in the HARQ feedback window, and demodulating the received HARQ ACK on the reserved two resources respectively.
In this step, since the received HARQ ACK is demodulated on one resource in the PUCCH resource set 1 and one resource in the PUCCH resource set 2, respectively, if the data transmission between the base station and the UE is completely normal, when the base station determines that (HARQ ACK bit number+csi bit number) is greater than N2 and less than or equal to N3, the base station reserves one PUCCH resource in the PUCCH resource set 2, and the UE uses the PUCCH resource in the PUCCH resource set 2 to demodulate, so that the base station de-demodulates the HARQ ACK on one PUCCH resource in the PUCCH resource set 2 will be successfully demodulated; if the DCI missed detection occurs at the UE side, the number of (HARQ ACK bits+csi bits) that would cause the actual feedback of the UE is less than N2, the UE uses the resources in PUCCH resource set 1, and at this time, the base station demodulates the HARQ ACK on one PUCCH resource in PUCCH resource set 1, and will be successfully demodulated; therefore, the problem of HARQ ACK demodulation failure can be effectively avoided.
Step 309, reserving one resource on each of the PUCCH resource set 2 and PUCCH resource set 3 in the HARQ feedback window, and demodulating the received HARQ ACK on the reserved two resources respectively.
In this step, since the received HARQ ACK is demodulated on one resource in the PUCCH resource set 2 and one resource in the PUCCH resource set 3, if the data transmission between the base station and the UE is completely normal, when the number of HARQ ACK bits+the number of CSI bits determined by the base station is greater than N3, the base station reserves one PUCCH resource in the PUCCH resource set 3, and the UE uses the PUCCH resource in the PUCCH resource set 3 to demodulate the HARQ ACK, so that the base station demodulates the HARQ ACK on one PUCCH resource in the PUCCH resource set 3 successfully; if the DCI missed detection occurs at the UE side, the number of HARQ ack+csi bits that may be actually fed back by the UE is smaller than N3, the UE uses the resources in the PUCCH resource set 2, and at this time, the base station demodulates the HARQ ACK on one PUCCH resource in the PUCCH resource set 2, and will be successfully demodulated; therefore, the problem of HARQ ACK demodulation failure can be effectively avoided.
The following points are additionally described for the above embodiments:
(1) In the above specific implementation, the base station sends DCI as: the single codeword, no CBG (Code Block Group) transmission is configured, and the HARQ dynamic codebook is used, so that the UE generates one bit HARQ ACK for one PDSCH decoding result, i.e. the UE receives several DCIs, can decode several PDSCHs, and feeds back several bits of HARQ ACK, which is also known to those skilled in the art.
(2) In the above embodiments, as known to those skilled in the art, the maximum scheduling number in the HARQ feedback window is related to the frame structure and the scheduling timing, which is not limited by the present application.
In addition, in other specific implementations, if the base station transmits DCI is not configured as above: the number of bits for generating HARQ ACKs for one PDSCH decoding result by the UE will be determined according to the actual scenario, but the base station is also known when issuing each DCI, so the base station may determine a PUCCH resource set for demodulating the received HARQ ACKs according to the number of DCIs issued in one HARQ feedback window, and reserve one resource in the PUCCH resource set before the PUCCH resource set to demodulate the received HARQ ACKs, so as to avoid the problem of PUCCH demodulation failure caused by different PUCCH resource bases used by the UE and the base station due to DCI omission on the UE side.
When the base station predicts that if the UE side generates DCI missed detection, the PUCCH resources used by the UE side are different from those of the base station side, one PUCCH resource is reserved, and the base station PHY layer demodulates all 2 PUCCH resources, so that the problem that the PUCCH demodulation failure is caused by different PUCCH resources used by the UE side and the base station side due to the DCI missed detection is effectively solved, and the robustness of the PUCCH demodulation is improved. .
Fig. 4 is a schematic structural diagram of a PUCCH demodulation device according to an embodiment of the present application. As shown in fig. 4, the apparatus is applied to a base station side, and the apparatus includes:
an obtaining module 401, configured to obtain a theoretical value of a bit number of UCI sent by a UE, where the theoretical value is determined at least according to a number of times of DCI sent by a base station in one HARQ feedback window;
a determining module 402, configured to determine a PUCCH resource set that matches the theoretical value, to obtain a PUCCH resource set i;
a demodulation module 403, configured to demodulate HARQ ACK by using the PUCCH resource set i and the PUCCH resource set i-1, respectively, when the theoretical value is greater than a preset threshold value;
when the UCI only carries HARQ ACK, the threshold is a maximum value N1 of UCI load of PUCCH resource set 0;
where i=1, 2,3.
The device provided by the embodiment of the application not only demodulates the received HARQ ACK by using the PUCCH resource set i matched with the theoretical value of the bit number of UCI, but also demodulates the received HARQ ACK by using the PUCCH resource set i-1, thereby realizing the purpose of demodulating the HARQ ACK by using two PUCCH resource sets respectively, avoiding demodulation failure caused by different PUCCH resource sets reserved by the base station and PUCCH resource sets actually used by the UE, and improving the demodulation success rate.
An embodiment of the application provides a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the method as described in any of the preceding claims when run.
An embodiment of the application provides a base station comprising a memory having stored therein a computer program and a processor arranged to run the computer program to perform the method as described in any of the preceding claims.
Those of ordinary skill in the art will appreciate that all or some of the steps, systems, functional modules/units in the apparatus, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between the functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed cooperatively by several physical components. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.

Claims (10)

1. A PUCCH demodulation method, applied to a base station side, the method comprising:
acquiring a theoretical value of the bit number of uplink control information UCI sent by User Equipment (UE), wherein the theoretical value is determined at least according to the times of downlink control information DCI sent by a base station in a hybrid automatic repeat request (HARQ) feedback window;
determining a physical layer uplink control channel (PUCCH) resource set matched with the theoretical value to obtain a PUCCH resource set i;
when the theoretical value is larger than a preset threshold value, the received HARQ response is respectively demodulated by using the PUCCH resource set i and the PUCCH resource set i-1;
when the UCI only carries HARQ response, the threshold is the maximum value N1 of UCI load of PUCCH resource set 0;
where i=1, 2,3.
2. The method according to claim 1, characterized in that:
the UCI further carries control data other than HARQ acknowledgement, wherein the control data includes at least one of first sub-control data having no corresponding bit transmission information in the UCI and second sub-control data having corresponding bit transmission information in the UCI; wherein:
when the control data is first sub-control data, the threshold is the maximum value N1 of UCI load of the PUCCH resource set 0;
when the control data is second sub-control data, or when the control data includes first sub-control data and second sub-control data, the threshold is a maximum value N2 of UCI load of PUCCH resource set 1.
3. The method according to claim 2, characterized in that:
the first sub-control data is a scheduling request SR;
the second sub-control data is Channel State Information (CSI).
4. A method according to claim 3, characterized in that:
when the control data is CSI, or when the control data includes CSI and SR, the theoretical value is determined according to the number of times of DCI transmission and the number of bits of CSI fed back by the UE set by the base station.
5. The method of claim 2, wherein the PUCCH resource set i is obtained by:
if the theoretical value is greater than a maximum value N1, the PUCCH resource set i is a PUCCH resource set 1;
if the theoretical value is greater than the maximum value N2 and is less than or equal to the maximum value N3 of UCI load of the PUCCH resource set 2, the PUCCH resource set i is the PUCCH resource set 2;
and if the theoretical value is greater than the maximum value N3, the PUCCH resource set i is the PUCCH resource set 3.
6. The method according to claim 1, wherein demodulating the received HARQ response using PUCCH resource set i and PUCCH resource set i-1, respectively, comprises:
and when the UCI only carries DCI, demodulating the received HARQ response in the PUCCH resource set i and the PUCCH resource set i-1 respectively in the N1 th time and each subsequent downlink scheduling in the HARQ feedback window.
7. The method according to any one of claims 1 to 5, further comprising:
and when the theoretical value is smaller than or equal to the threshold value, only demodulating the received HARQ response by using the PUCCH resource set corresponding to the threshold value.
8. The method of claim 1, wherein the DCI is a single codeword and is transmitted using a HARQ dynamic codebook and not over a code block group, CBG.
9. A PUCCH demodulation device, applied to a base station side, comprising:
the acquisition module is used for acquiring a theoretical value of the bit number of UCI (uplink control information) sent by the UE, wherein the theoretical value is determined at least according to the times of DCI (downlink control information) sent by the base station in one HARQ feedback window;
the determining module is used for determining the PUCCH resource set matched with the theoretical value to obtain a PUCCH resource set i;
the demodulation module is used for demodulating the HARQ response by using the PUCCH resource set i and the PUCCH resource set i-1 respectively when the theoretical value is larger than a preset threshold value;
when the UCI only carries HARQ response, the threshold is the maximum value N1 of UCI load of PUCCH resource set 0;
where i=1, 2,3.
10. A base station comprising a memory and a processor, wherein the memory has stored therein a computer program, the processor being arranged to run the computer program to perform the method of any of claims 1 to 8.
CN202310822566.1A 2023-07-05 2023-07-05 PUCCH demodulation method and device and base station Pending CN116800386A (en)

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