CN110662303A - Method and system for indicating PUCCH resources in uplink scheduling - Google Patents

Method and system for indicating PUCCH resources in uplink scheduling Download PDF

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Publication number
CN110662303A
CN110662303A CN201810684762.6A CN201810684762A CN110662303A CN 110662303 A CN110662303 A CN 110662303A CN 201810684762 A CN201810684762 A CN 201810684762A CN 110662303 A CN110662303 A CN 110662303A
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uplink scheduling
pucch
scheduling dci
content
terminal
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卫琳
冯世英
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Potevio Information Technology Co Ltd
Putian Information Technology Co Ltd
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Putian Information Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application provides a method and a system for indicating PUCCH resources in uplink scheduling, wherein the method comprises the following steps: when a base station sends uplink scheduling Downlink Control Information (DCI) to a terminal, a resource occupation field is added in the DCI for indicating whether PUCCH feedback exists in a scheduled wireless frame; and when the terminal receives the uplink scheduling DCI sent by the base station, determining whether to use PUCCH resources in the corresponding wireless frame to transmit a PUSCH signal according to the content of the resource occupation field. The method can lead the terminal and the base station to have consistent understanding on the PUSCH resource, and can not cause the failure of uplink transmission.

Description

Method and system for indicating PUCCH resources in uplink scheduling
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and a system for indicating Physical Uplink Control Channel (PUCCH) resources in Uplink scheduling.
Background
With the development of the smart power grid, the electricity consumption information acquisition system puts new and higher requirements on communication channels. At present, the 230MHz frequency band is mainly applied to a data transmission radio station to undertake remote data acquisition work, and the provided rate is very low, so that the data transmission radio station can only be used for some simple communication applications, and the increasing service requirements of a smart power grid and a sensor network cannot be met.
The TD-LTE230 power utilization information acquisition system is a wireless communication system which is based on a TD-LTE technology, combines advanced technologies such as spectrum sensing, carrier aggregation, interference demodulation and software radio, uses discrete spectrum resources in a 230MHz frequency band in the power industry, and is innovated, researched and developed and deeply customized. The method is deeply customized according to the communication requirements of the power service, optimizes a public network TD-LTE technical system, a communication protocol and a networking structure, and improves the capacity of the terminal and the real-time performance of the service.
The 223.025-235.000 MHz frequency band is used for telemetering, remote control, data transmission and other services, and consists of a plurality of scattered 25k channels, and adjacent frequencies are assigned to other industries for use, so that no wider continuous spectrum resource exists. The number of the electric power authorization frequency points is 40, and the electric power authorization frequency points are distributed in a discrete and unequal interval mode.
Referring to fig. 1, fig. 1 is a schematic diagram of a frame structure in the TD-LTE230 technology. In fig. 1, a radio frame is composed of 5 subframes with a length of 5ms, where subframe 0 is a downlink subframe, and subframes 2, 3, and 4 are uplink subframes; subframe 1 is a special subframe, and includes 3 fields, which are a Downlink Pilot Time Slot (DwPTS), a Guard Period (GP), and an Uplink Pilot Time Slot (UpPTS), respectively.
The Downlink transmission is indicated by the base station sending Downlink Control Information (DCI) to the UE. According to the difference of the UE capability, the UE can be divided into a single sub-band terminal and a multi-sub-band terminal. The single sub-band terminal and the multi-sub-band terminal both perform an attachment process in a single sub-band form, and after the attachment, the base station allocates one camping sub-band to each UE.
And when the UE does not have service transmission, the UE monitors the resident sub-band, and if DCI information scrambled by the C-RNTI of the UE is received, uplink or downlink transmission is carried out according to the indication of the base station. Before the base station carries out multi-subband scheduling for a multi-subband user, the base station firstly sends multi-subband starting DCI to the user, wherein the multi-subband starting DCI carries information such as a starting subband, the maximum number of occupied subbands of the DCI and the like. And the UE jumps to the corresponding sub-band blind detection PDCCH.
When downlink data needs to be transmitted, downlink scheduling DCI and the downlink data are transmitted in the same radio frame. And the feedback of the downlink data by the terminal is sent in a PUCCH channel of the next wireless frame, and the PUCCH is loaded on the first subband of the PDCCH channel of the multi-subband terminal. When there is no PUCCH to transmit, a reserved physical uplink shared Channel (PUCCH) resource may transmit PUSCH through rate matching. The uplink scheduling DCI indicates a user to transmit uplink data in the current frame or the next frame. In a radio frame, the same user may have only uplink scheduling or only downlink scheduling or uplink and downlink simultaneous scheduling.
Referring to fig. 2, fig. 2 is a schematic diagram of uplink scheduling information and uplink data transmission in a conventional implementation. In fig. 2, taking 16 subbands as an example, the nth frame transmits uplink scheduling information, the (N + 1) th frame transmits uplink data corresponding to the uplink scheduling information transmitted on the nth frame, the (N + 1) th frame transmits uplink scheduling information, and the (N + 2) th frame transmits uplink data corresponding to the uplink scheduling information transmitted on the (N + 1) th frame. And so on.
By using the prior art, when the transmission quality of a downlink channel is reduced and downlink DCI is lost, the base station and the terminal do not process the PUCCH feedback. Taking fig. 2 as an example, assuming that the downlink DCI of the nth frame is lost, the terminal considers that there is no downlink scheduling in the frame, so that feedback is not required in the N +1 frame, and PUCCH resources can be used. However, the base station waits for PUCCH feedback in N +1 frames because downlink DCI is transmitted. Due to inconsistent PUSCH resource analyses at the two ends, uplink transmission failure may result.
Disclosure of Invention
In view of this, the present application provides a method and a system for indicating a PUCCH resource in uplink scheduling, which can make a terminal and a base station have consistent understanding of the PUSCH resource and do not cause uplink transmission failure.
In order to solve the technical problem, the technical scheme of the application is realized as follows:
a method of indicating PUCCH resources in uplink scheduling, the method comprising:
when a base station sends uplink scheduling DCI to a terminal, a resource occupation field is added in the uplink scheduling DCI for indicating whether PUCCH feedback exists in a scheduled wireless frame;
and when the terminal receives the uplink scheduling DCI sent by the base station, determining whether to use PUCCH resources in the corresponding wireless frame to transmit the PUSCH signal according to the content of the resource occupation field.
If the base station sends downlink scheduling DCI and responds to the transmission content indicated by the downlink scheduling DCI in the wireless frame scheduled by the uplink scheduling DCI, indicating that PUCCH feedback exists in the wireless frame indicated by the uplink scheduling DCI by the content indication of the resource occupation field; otherwise, the content of the resource occupation field indicates that no PUCCH feedback exists in the radio frame indicated by the uplink scheduling DCI.
Wherein the determining whether to use the PUCCH resource in the corresponding radio frame for transmitting the PUSCH signal according to the content of the resource occupation field comprises:
when the content of the resource occupation field indicates that PUCCH feedback exists in the wireless frame indicated by the uplink scheduling DCI, the terminal does not use PUCCH resources in the corresponding wireless frame to transmit PUSCH signals;
and when the content of the resource occupation field indicates that no PUCCH feedback exists in the wireless frame indicated by the uplink scheduling DCI, the terminal transmits the PUSCH signal by using the PUCCH resource in the corresponding wireless frame.
A system for indicating physical uplink control channel, PUCCH, resources in uplink scheduling, the system comprising: a base station and a terminal;
the base station is used for increasing a resource occupation field in the uplink scheduling DCI when the uplink scheduling DCI is sent to the terminal and is used for indicating whether PUCCH feedback exists in a scheduled wireless frame or not;
and the terminal is used for determining whether to use PUCCH resources in a corresponding wireless frame to transmit a PUSCH signal according to the content of the resource occupation field when receiving the uplink scheduling DCI sent by the base station.
Wherein the content of the first and second substances,
the base station is further configured to, if downlink scheduling DCI is sent and transmission content indicated by the downlink scheduling DCI is responded in a radio frame scheduled by the uplink scheduling DCI, indicate that PUCCH feedback exists in the radio frame indicated by the uplink scheduling DCI by the content of the resource occupancy field; otherwise, the content of the resource occupation field indicates that no PUCCH feedback exists in the radio frame indicated by the uplink scheduling DCI.
Wherein the content of the first and second substances,
the terminal, when specifically configured to determine whether to use a PUCCH resource in a corresponding radio frame to transmit a PUSCH signal according to the content of the resource occupancy field, includes: when the content of the resource occupation field indicates that PUCCH feedback exists in the wireless frame indicated by the uplink scheduling DCI, the terminal does not use PUCCH resources in the corresponding wireless frame to transmit PUSCH signals; and when the content of the resource occupation field indicates that no PUCCH feedback exists in the wireless frame indicated by the uplink scheduling DCI, the terminal transmits the PUSCH signal by using the PUCCH resource in the corresponding wireless frame.
According to the technical scheme, whether the PUCCH resources in the wireless frame are occupied or not is explicitly indicated in the uplink scheduling DCI by the base station, so that the terminal carries out PUSCH signal transmission according to whether the PUCCH resources are occupied or not, the terminal and the base station can understand the PUSCH resources consistently, and uplink transmission failure cannot be caused.
Drawings
FIG. 1 is a schematic diagram of a frame structure in the TD-LTE230 technology;
fig. 2 is a schematic diagram of uplink scheduling information and uplink data transmission in a conventional implementation;
fig. 3 is a flowchart illustrating that PUCCH resources are indicated in uplink scheduling in an embodiment of the present application;
fig. 4 is a schematic diagram illustrating that the content of the resource occupancy field in the embodiment of the present application indicates that there is no PUCCH feedback in the radio frame indicated by the uplink scheduling DCI;
fig. 5 is a schematic diagram of a system applied to the above technology in the embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the technical solutions of the present invention are described in detail below with reference to the accompanying drawings and examples.
The embodiment of the application provides a method for indicating PUCCH resources in uplink scheduling, wherein a base station explicitly indicates whether PUCCH resources in a wireless frame are occupied in uplink scheduling DCI (Downlink control information), so that a terminal transmits PUSCH signals according to whether the PUCCH resources are occupied, the terminal and the base station can understand the PUSCH resources consistently, and uplink transmission failure cannot be caused.
The following describes in detail a procedure for indicating PUCCH resources in uplink scheduling implemented in this embodiment of the present application with reference to the accompanying drawings.
Referring to fig. 3, fig. 3 is a schematic flowchart illustrating that PUCCH resources are indicated in uplink scheduling in this embodiment of the application. The method comprises the following specific steps:
step 301, when the base station sends the uplink scheduling DCI to the terminal, a resource occupation field is added to the uplink scheduling DCI to indicate whether PUCCH feedback exists in a scheduled radio frame.
A base station increases a resource occupation field in sending the uplink scheduling DCI, and when the uplink scheduling DCI is specifically implemented, the base station only needs to use one bit to represent the DCI, and if the bit is 1, the base station represents that PUCCH feedback exists; when the bit is 0, it indicates that there is no PUCCH feedback.
The base station sends downlink scheduling DCI to the terminal as required, and the terminal responds to the transmission content indicated by the downlink scheduling DCI in the corresponding wireless frame, namely sends PUCCH feedback.
In the existing implementation, downlink scheduling DCI may be lost, so that a base station deducts resources occupied by PUCCH feedback when receiving PUSCH signals in corresponding wireless frames; the terminal cannot deduct resources occupied by PUCCH feedback, so that PUSCH resources at two ends are not resolved consistently;
and when the base station sends the uplink scheduling DCI to the terminal, the base station indicates whether to send PUCCH feedback in the corresponding wireless frame.
If the base station sends downlink scheduling DCI and responds to the transmission content indicated by the downlink scheduling DCI in the wireless frame scheduled by the uplink scheduling DCI, indicating that PUCCH feedback exists in the wireless frame indicated by the uplink scheduling DCI by the content indication of the resource occupation field;
in a specific implementation, the radio frame responding to the downlink scheduling may be in the same frame as the uplink scheduling DCI, or may be in a different frame, and is related to the radio frame scheduled by the uplink scheduling DCI in the specific implementation.
Still taking fig. 2 as an example, fig. 2 takes 16 subbands as an example, and takes the uplink scheduling DCI as an example to schedule the next frame; the uplink scheduling DCI indication of the Nth frame has PUCCH feedback, and the PUCCH shown in the (N + 1) th frame occupies resources.
The base station does not need to respond to the downlink scheduling in the frame, and the content of the resource occupation field indicates that PUCCH feedback does not exist in the wireless frame indicated by the uplink scheduling DCI.
Referring to fig. 4, fig. 4 is a schematic diagram illustrating that the content of the resource occupancy field in the embodiment of the present application indicates that there is no PUCCH feedback in the radio frame indicated by the uplink scheduling DCI.
In fig. 4, the 16 subbands are taken as an example, and the downlink scheduling DCI is taken as an example to schedule the next frame; there is no PUCCH feedback in the uplink scheduling DCI indication of the nth frame, and the PUCCH shown in the N +1 th frame does not occupy resources.
Step 302, when the terminal receives the uplink scheduling DCI sent by the base station, it determines whether to use the PUCCH resource in the corresponding radio frame to transmit the PUSCH signal according to the content of the resource occupation field.
In this step, determining whether to use PUCCH resources in a corresponding radio frame to transmit a PUSCH signal according to the content of the resource occupation field includes:
when the content of the resource occupation field indicates that PUCCH feedback exists in the wireless frame indicated by the uplink scheduling DCI, the terminal does not use PUCCH resources in the corresponding wireless frame to transmit PUSCH signals; i.e., the resource occupation case as shown in fig. 2, the terminal does not transmit the PUSCH signal using the PUCCH resource in the N +1 th frame.
And when the content of the resource occupation field indicates that no PUCCH feedback exists in the wireless frame indicated by the uplink scheduling DCI, the terminal transmits the PUSCH signal by using the PUCCH resource in the corresponding wireless frame. I.e., the resource occupancy case as shown in fig. 4, the PUSCH signal may be transmitted using the PUCCH resource in the N +1 th frame.
Based on the same inventive concept, the application also provides a system for indicating the PUCCH resource in uplink scheduling. Referring to fig. 5, fig. 5 is a schematic diagram of a system applied to the above technology in the embodiment of the present application. The system comprises: a base station and a terminal;
the base station is used for increasing a resource occupation field in the uplink scheduling DCI when the uplink scheduling DCI is sent to the terminal and is used for indicating whether PUCCH feedback exists in a scheduled wireless frame or not;
and the terminal is used for determining whether to use PUCCH resources in a corresponding wireless frame to transmit a PUSCH signal according to the content of the resource occupation field when receiving the uplink scheduling DCI sent by the base station.
In a specific implementation, the radio frame responding to the downlink scheduling may be in the same frame as the uplink scheduling DCI, or may be in a different frame, and is related to the radio frame scheduled by the uplink scheduling DCI in the specific implementation.
Preferably, the first and second liquid crystal films are made of a polymer,
the base station is further configured to, if downlink scheduling DCI is sent and transmission content indicated by the downlink scheduling DCI is responded in a radio frame scheduled by the uplink scheduling DCI, indicate that PUCCH feedback exists in the radio frame indicated by the uplink scheduling DCI by the content of the resource occupancy field; otherwise, the content of the resource occupation field indicates that no PUCCH feedback exists in the radio frame indicated by the uplink scheduling DCI.
Preferably, the first and second liquid crystal films are made of a polymer,
the terminal, when specifically configured to determine whether to use a PUCCH resource in a corresponding radio frame to transmit a PUSCH signal according to the content of the resource occupancy field, includes: when the content of the resource occupation field indicates that PUCCH feedback exists in the wireless frame indicated by the uplink scheduling DCI, the terminal does not use PUCCH resources in the corresponding wireless frame to transmit PUSCH signals; and when the content of the resource occupation field indicates that no PUCCH feedback exists in the wireless frame indicated by the uplink scheduling DCI, the terminal transmits the PUSCH signal by using the PUCCH resource in the corresponding wireless frame.
In summary, according to the present application, whether a PUCCH resource in a radio frame is occupied is explicitly indicated in the uplink scheduling DCI at the base station, so that the terminal performs PUSCH signal transmission according to whether the PUCCH resource is occupied, the terminal and the base station can understand the PUSCH resource consistently, and uplink transmission failure is not caused.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, 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 method for indicating Physical Uplink Control Channel (PUCCH) resources in uplink scheduling, the method comprising:
when a base station sends uplink scheduling Downlink Control Information (DCI) to a terminal, a resource occupation field is added in the DCI for indicating whether PUCCH feedback exists in a scheduled wireless frame;
and when the terminal receives the uplink scheduling DCI sent by the base station, determining whether to use PUCCH resources in the corresponding wireless frame to transmit a PUSCH signal according to the content of the resource occupation field.
2. The method of claim 1,
if the base station sends downlink scheduling DCI and responds to the transmission content indicated by the downlink scheduling DCI in the wireless frame scheduled by the uplink scheduling DCI, indicating that PUCCH feedback exists in the wireless frame indicated by the uplink scheduling DCI by the content of the resource occupation field; otherwise, the content of the resource occupation field indicates that no PUCCH feedback exists in the radio frame indicated by the uplink scheduling DCI.
3. The method according to claim 1 or 2, wherein the determining whether to use the PUCCH resource in the corresponding radio frame for transmitting the PUSCH signal according to the content of the resource occupancy field comprises:
when the content of the resource occupation field indicates that PUCCH feedback exists in the wireless frame indicated by the uplink scheduling DCI, the terminal does not use PUCCH resources in the corresponding wireless frame to transmit PUSCH signals;
and when the content of the resource occupation field indicates that no PUCCH feedback exists in the wireless frame indicated by the uplink scheduling DCI, the terminal transmits the PUSCH signal by using the PUCCH resource in the corresponding wireless frame.
4. A system for indicating physical uplink control channel, PUCCH, resources in uplink scheduling, the system comprising: a base station and a terminal;
the base station is used for increasing a resource occupation field in the uplink scheduling DCI when the uplink scheduling DCI is sent to the terminal and is used for indicating whether PUCCH feedback exists in a scheduled wireless frame or not;
and the terminal is used for determining whether to use PUCCH resources in a corresponding wireless frame to transmit a PUSCH signal according to the content of the resource occupation field when receiving the uplink scheduling DCI sent by the base station.
5. The system of claim 4,
the base station is further configured to, if downlink scheduling DCI is sent and transmission content indicated by the downlink scheduling DCI is responded in a radio frame scheduled by the uplink scheduling DCI, indicate that PUCCH feedback exists in the radio frame indicated by the uplink scheduling DCI by the content of the resource occupancy field; otherwise, the content of the resource occupation field indicates that no PUCCH feedback exists in the radio frame indicated by the uplink scheduling DCI.
6. The method according to claim 4 or 5,
the terminal, when specifically configured to determine whether to use a PUCCH resource in a corresponding radio frame to transmit a PUSCH signal according to the content of the resource occupancy field, includes: when the content of the resource occupation field indicates that PUCCH feedback exists in the wireless frame indicated by the uplink scheduling DCI, the terminal does not use PUCCH resources in the corresponding wireless frame to transmit PUSCH signals; and when the content of the resource occupation field indicates that no PUCCH feedback exists in the wireless frame indicated by the uplink scheduling DCI, the terminal transmits the PUSCH signal by using the PUCCH resource in the corresponding wireless frame.
CN201810684762.6A 2018-06-28 2018-06-28 Method and system for indicating PUCCH resources in uplink scheduling Pending CN110662303A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101621849A (en) * 2008-06-30 2010-01-06 中兴通讯股份有限公司 A kind of feedback method of downlink data receiving state
WO2014182009A1 (en) * 2013-05-06 2014-11-13 주식회사 케이티 Method for transmitting and receiving response signal and apparatus therefor
CN104579591A (en) * 2013-10-18 2015-04-29 普天信息技术有限公司 Feedback resource distribution method and system for TDD (Time Division Duplexing) downlink multi-subframe scheduling

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101621849A (en) * 2008-06-30 2010-01-06 中兴通讯股份有限公司 A kind of feedback method of downlink data receiving state
WO2014182009A1 (en) * 2013-05-06 2014-11-13 주식회사 케이티 Method for transmitting and receiving response signal and apparatus therefor
CN104579591A (en) * 2013-10-18 2015-04-29 普天信息技术有限公司 Feedback resource distribution method and system for TDD (Time Division Duplexing) downlink multi-subframe scheduling

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Application publication date: 20200107